diff --git a/src/main/java/ai/elimu/model/contributor/ContributionEvent.java b/src/main/java/ai/elimu/model/contributor/ContributionEvent.java
index 2b1a2dade..53c851a9a 100644
--- a/src/main/java/ai/elimu/model/contributor/ContributionEvent.java
+++ b/src/main/java/ai/elimu/model/contributor/ContributionEvent.java
@@ -1,7 +1,6 @@
 package ai.elimu.model.contributor;
 
 import ai.elimu.model.BaseEntity;
-import ai.elimu.model.enums.Platform;
 import java.util.Calendar;
 import javax.persistence.*;
 import javax.validation.constraints.NotNull;
@@ -37,13 +36,6 @@ public class ContributionEvent extends BaseEntity {
      */
     @NotNull
     private Long timeSpentMs;
-    
-    /**
-     * The platform that the {@link Contributor} used when making the contribution.
-     */
-    @NotNull
-    @Enumerated(EnumType.STRING)
-    private Platform platform;
 
     public String getComment() {
         return comment;
@@ -84,12 +76,4 @@ public Long getTimeSpentMs() {
     public void setTimeSpentMs(Long timeSpentMs) {
         this.timeSpentMs = timeSpentMs;
     }
-    
-    public Platform getPlatform() {
-        return platform;
-    }
-    
-    public void setPlatform(Platform platform) {
-        this.platform = platform;
-    }
 }
diff --git a/src/main/java/ai/elimu/util/db/DbContentImportHelper.java b/src/main/java/ai/elimu/util/db/DbContentImportHelper.java
index a592060b2..e49e8e639 100644
--- a/src/main/java/ai/elimu/util/db/DbContentImportHelper.java
+++ b/src/main/java/ai/elimu/util/db/DbContentImportHelper.java
@@ -35,7 +35,6 @@
 import ai.elimu.model.contributor.NumberContributionEvent;
 import ai.elimu.model.contributor.StoryBookContributionEvent;
 import ai.elimu.model.contributor.WordContributionEvent;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.model.enums.Role;
 import ai.elimu.model.v2.enums.Environment;
 import ai.elimu.model.v2.enums.Language;
@@ -151,7 +150,6 @@ public synchronized void performDatabaseContentImport(Environment environment, L
             letterContributionEvent.setRevisionNumber(1);
             letterContributionEvent.setTime(Calendar.getInstance());
             letterContributionEvent.setTimeSpentMs((long)(Math.random() * 10) * 60000L);
-            letterContributionEvent.setPlatform(Platform.WEBAPP);
             letterContributionEventDao.create(letterContributionEvent);
         }
 
@@ -179,7 +177,6 @@ public synchronized void performDatabaseContentImport(Environment environment, L
             letterSoundContributionEvent.setRevisionNumber(1);
             letterSoundContributionEvent.setTime(Calendar.getInstance());
             letterSoundContributionEvent.setTimeSpentMs((long)(Math.random() * 10) * 60000L);
-            letterSoundContributionEvent.setPlatform(Platform.WEBAPP);
             letterSoundContributionEventDao.create(letterSoundContributionEvent);
         }
 
@@ -198,7 +195,6 @@ public synchronized void performDatabaseContentImport(Environment environment, L
             wordContributionEvent.setRevisionNumber(1);
             wordContributionEvent.setTime(Calendar.getInstance());
             wordContributionEvent.setTimeSpentMs((long)(Math.random() * 10) * 60000L);
-            wordContributionEvent.setPlatform(Platform.WEBAPP);
             wordContributionEventDao.create(wordContributionEvent);
         }
 
@@ -217,7 +213,6 @@ public synchronized void performDatabaseContentImport(Environment environment, L
             numberContributionEvent.setRevisionNumber(1);
             numberContributionEvent.setTime(Calendar.getInstance());
             numberContributionEvent.setTimeSpentMs((long)(Math.random() * 10) * 60000L);
-            numberContributionEvent.setPlatform(Platform.WEBAPP);
             numberContributionEventDao.create(numberContributionEvent);
         }
 
@@ -308,7 +303,6 @@ public synchronized void performDatabaseContentImport(Environment environment, L
             storyBookContributionEvent.setRevisionNumber(1);
             storyBookContributionEvent.setTime(Calendar.getInstance());
             storyBookContributionEvent.setTimeSpentMs((long)(Math.random() * 10) * 60000L);
-            storyBookContributionEvent.setPlatform(Platform.WEBAPP);
             storyBookContributionEventDao.create(storyBookContributionEvent);
         }
 
diff --git a/src/main/java/ai/elimu/web/content/letter/LetterCreateController.java b/src/main/java/ai/elimu/web/content/letter/LetterCreateController.java
index 21190e766..073846e07 100644
--- a/src/main/java/ai/elimu/web/content/letter/LetterCreateController.java
+++ b/src/main/java/ai/elimu/web/content/letter/LetterCreateController.java
@@ -9,7 +9,6 @@
 import ai.elimu.model.content.Letter;
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.LetterContributionEvent;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.util.DiscordHelper;
 import ai.elimu.web.context.EnvironmentContextLoaderListener;
 import javax.servlet.http.HttpServletRequest;
@@ -77,7 +76,6 @@ public String handleSubmit(
             letterContributionEvent.setRevisionNumber(letter.getRevisionNumber());
             letterContributionEvent.setComment(StringUtils.abbreviate(request.getParameter("contributionComment"), 1000));
             letterContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            letterContributionEvent.setPlatform(Platform.WEBAPP);
             letterContributionEventDao.create(letterContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/letter/LetterEditController.java b/src/main/java/ai/elimu/web/content/letter/LetterEditController.java
index 21caf005e..fbd130c6d 100644
--- a/src/main/java/ai/elimu/web/content/letter/LetterEditController.java
+++ b/src/main/java/ai/elimu/web/content/letter/LetterEditController.java
@@ -9,7 +9,6 @@
 import ai.elimu.model.content.Letter;
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.LetterContributionEvent;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.util.DiscordHelper;
 import ai.elimu.web.context.EnvironmentContextLoaderListener;
 import javax.servlet.http.HttpServletRequest;
@@ -84,7 +83,6 @@ public String handleSubmit(
             letterContributionEvent.setRevisionNumber(letter.getRevisionNumber());
             letterContributionEvent.setComment(StringUtils.abbreviate(request.getParameter("contributionComment"), 1000));
             letterContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            letterContributionEvent.setPlatform(Platform.WEBAPP);
             letterContributionEventDao.create(letterContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/letter_sound/LetterSoundCreateController.java b/src/main/java/ai/elimu/web/content/letter_sound/LetterSoundCreateController.java
index 5f0b4c704..4dd38cf21 100644
--- a/src/main/java/ai/elimu/web/content/letter_sound/LetterSoundCreateController.java
+++ b/src/main/java/ai/elimu/web/content/letter_sound/LetterSoundCreateController.java
@@ -19,7 +19,6 @@
 import ai.elimu.dao.LetterSoundDao;
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.LetterSoundCorrespondenceContributionEvent;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.util.DiscordHelper;
 import ai.elimu.web.context.EnvironmentContextLoaderListener;
 import java.util.Calendar;
@@ -104,7 +103,6 @@ public String handleSubmit(
             letterSoundContributionEvent.setRevisionNumber(letterSound.getRevisionNumber());
             letterSoundContributionEvent.setComment(StringUtils.abbreviate(request.getParameter("contributionComment"), 1000));
             letterSoundContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            letterSoundContributionEvent.setPlatform(Platform.WEBAPP);
             letterSoundContributionEventDao.create(letterSoundContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/letter_sound/LetterSoundEditController.java b/src/main/java/ai/elimu/web/content/letter_sound/LetterSoundEditController.java
index 5e656d60b..705f5d738 100644
--- a/src/main/java/ai/elimu/web/content/letter_sound/LetterSoundEditController.java
+++ b/src/main/java/ai/elimu/web/content/letter_sound/LetterSoundEditController.java
@@ -23,7 +23,6 @@
 import ai.elimu.model.content.Word;
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.LetterSoundCorrespondenceContributionEvent;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.util.DiscordHelper;
 import java.util.Calendar;
 import javax.servlet.http.HttpServletRequest;
@@ -124,7 +123,6 @@ public String handleSubmit(
             letterSoundContributionEvent.setRevisionNumber(letterSound.getRevisionNumber());
             letterSoundContributionEvent.setComment(StringUtils.abbreviate(request.getParameter("contributionComment"), 1000));
             letterSoundContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            letterSoundContributionEvent.setPlatform(Platform.WEBAPP);
             letterSoundContributionEventDao.create(letterSoundContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/multimedia/audio/AudioCreateController.java b/src/main/java/ai/elimu/web/content/multimedia/audio/AudioCreateController.java
index 69991a7ac..1feb9d067 100644
--- a/src/main/java/ai/elimu/web/content/multimedia/audio/AudioCreateController.java
+++ b/src/main/java/ai/elimu/web/content/multimedia/audio/AudioCreateController.java
@@ -19,7 +19,6 @@
 import ai.elimu.model.contributor.AudioContributionEvent;
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.enums.ContentLicense;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.model.v2.enums.content.AudioFormat;
 import ai.elimu.model.v2.enums.content.LiteracySkill;
 import ai.elimu.model.v2.enums.content.NumeracySkill;
@@ -194,7 +193,6 @@ public String handleSubmit(
             audioContributionEvent.setRevisionNumber(audio.getRevisionNumber());
             audioContributionEvent.setComment(StringUtils.abbreviate(request.getParameter("contributionComment"), 1000));
             audioContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            audioContributionEvent.setPlatform(Platform.WEBAPP);
             audioContributionEventDao.create(audioContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/multimedia/audio/AudioEditController.java b/src/main/java/ai/elimu/web/content/multimedia/audio/AudioEditController.java
index 3987ec6d1..deb811809 100644
--- a/src/main/java/ai/elimu/web/content/multimedia/audio/AudioEditController.java
+++ b/src/main/java/ai/elimu/web/content/multimedia/audio/AudioEditController.java
@@ -25,7 +25,6 @@
 import ai.elimu.model.contributor.AudioContributionEvent;
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.enums.ContentLicense;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.model.v2.enums.content.AudioFormat;
 import ai.elimu.model.v2.enums.content.LiteracySkill;
 import ai.elimu.model.v2.enums.content.NumeracySkill;
@@ -191,7 +190,6 @@ public String handleSubmit(
             audioContributionEvent.setRevisionNumber(audio.getRevisionNumber());
             audioContributionEvent.setComment(StringUtils.abbreviate(request.getParameter("contributionComment"), 1000));
             audioContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            audioContributionEvent.setPlatform(Platform.WEBAPP);
             audioContributionEventDao.create(audioContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/multimedia/image/ImageCreateController.java b/src/main/java/ai/elimu/web/content/multimedia/image/ImageCreateController.java
index 61b26d774..ca2be579e 100644
--- a/src/main/java/ai/elimu/web/content/multimedia/image/ImageCreateController.java
+++ b/src/main/java/ai/elimu/web/content/multimedia/image/ImageCreateController.java
@@ -17,7 +17,6 @@
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.ImageContributionEvent;
 import ai.elimu.model.enums.ContentLicense;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.model.v2.enums.content.ImageFormat;
 import ai.elimu.model.v2.enums.content.LiteracySkill;
 import ai.elimu.model.v2.enums.content.NumeracySkill;
@@ -173,7 +172,6 @@ public String handleSubmit(
             imageContributionEvent.setRevisionNumber(image.getRevisionNumber());
             imageContributionEvent.setComment(StringUtils.abbreviate(request.getParameter("contributionComment"), 1000));
             imageContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            imageContributionEvent.setPlatform(Platform.WEBAPP);
             imageContributionEventDao.create(imageContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/multimedia/image/ImageEditController.java b/src/main/java/ai/elimu/web/content/multimedia/image/ImageEditController.java
index c571b0c3a..d15743472 100644
--- a/src/main/java/ai/elimu/web/content/multimedia/image/ImageEditController.java
+++ b/src/main/java/ai/elimu/web/content/multimedia/image/ImageEditController.java
@@ -25,7 +25,6 @@
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.ImageContributionEvent;
 import ai.elimu.model.enums.ContentLicense;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.model.v2.enums.content.ImageFormat;
 import ai.elimu.model.v2.enums.content.LiteracySkill;
 import ai.elimu.model.v2.enums.content.NumeracySkill;
@@ -205,7 +204,6 @@ public String handleSubmit(
             imageContributionEvent.setRevisionNumber(image.getRevisionNumber());
             imageContributionEvent.setComment(StringUtils.abbreviate(request.getParameter("contributionComment"), 1000));
             imageContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            imageContributionEvent.setPlatform(Platform.WEBAPP);
             imageContributionEventDao.create(imageContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/number/NumberCreateController.java b/src/main/java/ai/elimu/web/content/number/NumberCreateController.java
index c87792a96..79d59f827 100644
--- a/src/main/java/ai/elimu/web/content/number/NumberCreateController.java
+++ b/src/main/java/ai/elimu/web/content/number/NumberCreateController.java
@@ -14,7 +14,6 @@
 import ai.elimu.model.content.Word;
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.NumberContributionEvent;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.util.DiscordHelper;
 import ai.elimu.web.context.EnvironmentContextLoaderListener;
 import java.util.HashMap;
@@ -98,7 +97,6 @@ public String handleSubmit(
             numberContributionEvent.setRevisionNumber(number.getRevisionNumber());
             numberContributionEvent.setComment(StringUtils.abbreviate(request.getParameter("contributionComment"), 1000));
             numberContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            numberContributionEvent.setPlatform(Platform.WEBAPP);
             numberContributionEventDao.create(numberContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/number/NumberEditController.java b/src/main/java/ai/elimu/web/content/number/NumberEditController.java
index bdcb22498..252074a7a 100644
--- a/src/main/java/ai/elimu/web/content/number/NumberEditController.java
+++ b/src/main/java/ai/elimu/web/content/number/NumberEditController.java
@@ -15,7 +15,6 @@
 import ai.elimu.model.content.Word;
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.NumberContributionEvent;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.util.DiscordHelper;
 import ai.elimu.web.context.EnvironmentContextLoaderListener;
 import java.util.HashMap;
@@ -111,7 +110,6 @@ public String handleSubmit(
             numberContributionEvent.setRevisionNumber(number.getRevisionNumber());
             numberContributionEvent.setComment(request.getParameter("contributionComment"));
             numberContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            numberContributionEvent.setPlatform(Platform.WEBAPP);
             numberContributionEventDao.create(numberContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/sound/SoundCreateController.java b/src/main/java/ai/elimu/web/content/sound/SoundCreateController.java
index 4d6f31888..89cc43e23 100644
--- a/src/main/java/ai/elimu/web/content/sound/SoundCreateController.java
+++ b/src/main/java/ai/elimu/web/content/sound/SoundCreateController.java
@@ -19,7 +19,6 @@
 import ai.elimu.dao.SoundDao;
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.SoundContributionEvent;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.util.DiscordHelper;
 import ai.elimu.web.context.EnvironmentContextLoaderListener;
 import javax.servlet.http.HttpServletRequest;
@@ -89,7 +88,6 @@ public String handleSubmit(
             soundContributionEvent.setRevisionNumber(sound.getRevisionNumber());
             soundContributionEvent.setComment(StringUtils.abbreviate(request.getParameter("contributionComment"), 1000));
             soundContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            soundContributionEvent.setPlatform(Platform.WEBAPP);
             soundContributionEventDao.create(soundContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/sound/SoundEditController.java b/src/main/java/ai/elimu/web/content/sound/SoundEditController.java
index 9a282a478..4209ce882 100644
--- a/src/main/java/ai/elimu/web/content/sound/SoundEditController.java
+++ b/src/main/java/ai/elimu/web/content/sound/SoundEditController.java
@@ -21,7 +21,6 @@
 import ai.elimu.dao.SoundDao;
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.SoundContributionEvent;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.util.DiscordHelper;
 import ai.elimu.web.context.EnvironmentContextLoaderListener;
 import javax.servlet.http.HttpServletRequest;
@@ -102,7 +101,6 @@ public String handleSubmit(
             soundContributionEvent.setRevisionNumber(sound.getRevisionNumber());
             soundContributionEvent.setComment(StringUtils.abbreviate(request.getParameter("contributionComment"), 1000));
             soundContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            soundContributionEvent.setPlatform(Platform.WEBAPP);
             soundContributionEventDao.create(soundContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/storybook/StoryBookCreateController.java b/src/main/java/ai/elimu/web/content/storybook/StoryBookCreateController.java
index 2baa948b6..7ed609433 100644
--- a/src/main/java/ai/elimu/web/content/storybook/StoryBookCreateController.java
+++ b/src/main/java/ai/elimu/web/content/storybook/StoryBookCreateController.java
@@ -13,7 +13,6 @@
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.StoryBookContributionEvent;
 import ai.elimu.model.enums.ContentLicense;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.model.v2.enums.ReadingLevel;
 import ai.elimu.util.DiscordHelper;
 import ai.elimu.web.context.EnvironmentContextLoaderListener;
@@ -100,7 +99,6 @@ public String handleSubmit(
             storyBookContributionEvent.setRevisionNumber(storyBook.getRevisionNumber());
             storyBookContributionEvent.setComment(StringUtils.abbreviate(request.getParameter("contributionComment"), 1000));
             storyBookContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            storyBookContributionEvent.setPlatform(Platform.WEBAPP);
             storyBookContributionEventDao.create(storyBookContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/storybook/StoryBookCreateFromEPubController.java b/src/main/java/ai/elimu/web/content/storybook/StoryBookCreateFromEPubController.java
index 4a3c7fc1f..b3cea7b2f 100644
--- a/src/main/java/ai/elimu/web/content/storybook/StoryBookCreateFromEPubController.java
+++ b/src/main/java/ai/elimu/web/content/storybook/StoryBookCreateFromEPubController.java
@@ -19,7 +19,6 @@
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.ImageContributionEvent;
 import ai.elimu.model.contributor.StoryBookContributionEvent;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.model.v2.enums.content.ImageFormat;
 import ai.elimu.util.DiscordHelper;
 import ai.elimu.util.ImageColorHelper;
@@ -335,7 +334,6 @@ public String handleSubmit(
             storyBookContributionEvent.setRevisionNumber(storyBook.getRevisionNumber());
             storyBookContributionEvent.setComment("Uploaded ePUB file (🤖 auto-generated comment)");
             storyBookContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            storyBookContributionEvent.setPlatform(Platform.WEBAPP);
             storyBookContributionEventDao.create(storyBookContributionEvent);
             
             // Store the StoryBook's cover image in the database, and assign it to the StoryBook
@@ -506,7 +504,6 @@ private void storeImageContributionEvent(Image image, HttpSession session, HttpS
         imageContributionEvent.setRevisionNumber(image.getRevisionNumber());
         imageContributionEvent.setComment("Extracted from ePUB file (🤖 auto-generated comment)");
         imageContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-        imageContributionEvent.setPlatform(Platform.WEBAPP);
         imageContributionEventDao.create(imageContributionEvent);
 
         if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/storybook/StoryBookEditController.java b/src/main/java/ai/elimu/web/content/storybook/StoryBookEditController.java
index 6d4b8ab03..10faba493 100644
--- a/src/main/java/ai/elimu/web/content/storybook/StoryBookEditController.java
+++ b/src/main/java/ai/elimu/web/content/storybook/StoryBookEditController.java
@@ -28,7 +28,6 @@
 import ai.elimu.model.enums.ContentLicense;
 import ai.elimu.model.v2.enums.ReadingLevel;
 import ai.elimu.model.v2.enums.Language;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.rest.v2.service.StoryBooksJsonService;
 import ai.elimu.util.ConfigHelper;
 import ai.elimu.util.DiscordHelper;
@@ -220,7 +219,6 @@ public String handleSubmit(
             storyBookContributionEvent.setRevisionNumber(storyBook.getRevisionNumber());
             storyBookContributionEvent.setComment(StringUtils.abbreviate(request.getParameter("contributionComment"), 1000));
             storyBookContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            storyBookContributionEvent.setPlatform(Platform.WEBAPP);
             storyBookContributionEventDao.create(storyBookContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/storybook/chapter/StoryBookChapterCreateController.java b/src/main/java/ai/elimu/web/content/storybook/chapter/StoryBookChapterCreateController.java
index 01326606e..c9212669c 100644
--- a/src/main/java/ai/elimu/web/content/storybook/chapter/StoryBookChapterCreateController.java
+++ b/src/main/java/ai/elimu/web/content/storybook/chapter/StoryBookChapterCreateController.java
@@ -10,7 +10,6 @@
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.StoryBookContributionEvent;
 import ai.elimu.model.enums.PeerReviewStatus;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.util.DiscordHelper;
 import ai.elimu.web.context.EnvironmentContextLoaderListener;
 import java.util.Calendar;
@@ -105,7 +104,6 @@ public String handleSubmit(
             storyBookContributionEvent.setRevisionNumber(storyBook.getRevisionNumber());
             storyBookContributionEvent.setComment("Created storybook chapter " + (storyBookChapter.getSortOrder() + 1) + " (🤖 auto-generated comment)");
             storyBookContributionEvent.setTimeSpentMs(0L);
-            storyBookContributionEvent.setPlatform(Platform.WEBAPP);
             storyBookContributionEventDao.create(storyBookContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/storybook/chapter/StoryBookChapterDeleteController.java b/src/main/java/ai/elimu/web/content/storybook/chapter/StoryBookChapterDeleteController.java
index 4921913f6..98551d216 100644
--- a/src/main/java/ai/elimu/web/content/storybook/chapter/StoryBookChapterDeleteController.java
+++ b/src/main/java/ai/elimu/web/content/storybook/chapter/StoryBookChapterDeleteController.java
@@ -16,7 +16,6 @@
 import ai.elimu.model.contributor.ImageContributionEvent;
 import ai.elimu.model.contributor.StoryBookContributionEvent;
 import ai.elimu.model.enums.PeerReviewStatus;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.model.enums.Role;
 import ai.elimu.rest.v2.service.StoryBooksJsonService;
 import ai.elimu.util.DiscordHelper;
@@ -133,7 +132,6 @@ public String handleRequest(HttpSession session, @PathVariable Long storyBookId,
         storyBookContributionEvent.setRevisionNumber(storyBook.getRevisionNumber());
         storyBookContributionEvent.setComment("Deleted storybook chapter " + (storyBookChapterToBeDeleted.getSortOrder() + 1) + " (🤖 auto-generated comment)");
         storyBookContributionEvent.setTimeSpentMs(0L);
-        storyBookContributionEvent.setPlatform(Platform.WEBAPP);
         storyBookContributionEventDao.create(storyBookContributionEvent);
         
         if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/storybook/paragraph/StoryBookParagraphCreateController.java b/src/main/java/ai/elimu/web/content/storybook/paragraph/StoryBookParagraphCreateController.java
index 50b8fa2f8..2db1b534b 100644
--- a/src/main/java/ai/elimu/web/content/storybook/paragraph/StoryBookParagraphCreateController.java
+++ b/src/main/java/ai/elimu/web/content/storybook/paragraph/StoryBookParagraphCreateController.java
@@ -12,7 +12,6 @@
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.StoryBookContributionEvent;
 import ai.elimu.model.enums.PeerReviewStatus;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.rest.v2.service.StoryBooksJsonService;
 import ai.elimu.util.DiscordHelper;
 import ai.elimu.web.context.EnvironmentContextLoaderListener;
@@ -110,7 +109,6 @@ public String handleSubmit(
             storyBookContributionEvent.setRevisionNumber(storyBook.getRevisionNumber());
             storyBookContributionEvent.setComment("Created storybook paragraph in chapter " + (storyBookParagraph.getStoryBookChapter().getSortOrder() + 1) + " (🤖 auto-generated comment)");
             storyBookContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            storyBookContributionEvent.setPlatform(Platform.WEBAPP);
             storyBookContributionEventDao.create(storyBookContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/storybook/paragraph/StoryBookParagraphDeleteController.java b/src/main/java/ai/elimu/web/content/storybook/paragraph/StoryBookParagraphDeleteController.java
index f11d09137..69e0eec33 100644
--- a/src/main/java/ai/elimu/web/content/storybook/paragraph/StoryBookParagraphDeleteController.java
+++ b/src/main/java/ai/elimu/web/content/storybook/paragraph/StoryBookParagraphDeleteController.java
@@ -11,7 +11,6 @@
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.StoryBookContributionEvent;
 import ai.elimu.model.enums.PeerReviewStatus;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.model.enums.Role;
 import ai.elimu.rest.v2.service.StoryBooksJsonService;
 import ai.elimu.util.DiscordHelper;
@@ -91,7 +90,6 @@ public String handleRequest(HttpSession session, @PathVariable Long id) {
         storyBookContributionEvent.setComment("Deleted storybook paragraph in chapter " + (storyBookParagraphToBeDeleted.getStoryBookChapter().getSortOrder() + 1) + " (🤖 auto-generated comment)");
         storyBookContributionEvent.setParagraphTextBefore(paragraphTextBeforeDeletion);
         storyBookContributionEvent.setTimeSpentMs(0L);
-        storyBookContributionEvent.setPlatform(Platform.WEBAPP);
         storyBookContributionEventDao.create(storyBookContributionEvent);
         
         if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/storybook/paragraph/StoryBookParagraphEditController.java b/src/main/java/ai/elimu/web/content/storybook/paragraph/StoryBookParagraphEditController.java
index 8e19adf42..386e1c3a0 100644
--- a/src/main/java/ai/elimu/web/content/storybook/paragraph/StoryBookParagraphEditController.java
+++ b/src/main/java/ai/elimu/web/content/storybook/paragraph/StoryBookParagraphEditController.java
@@ -1,7 +1,5 @@
 package ai.elimu.web.content.storybook.paragraph;
 
-import ai.elimu.dao.AudioContributionEventDao;
-import ai.elimu.dao.AudioDao;
 import ai.elimu.dao.StoryBookContributionEventDao;
 import ai.elimu.dao.StoryBookDao;
 import org.apache.logging.log4j.Logger;
@@ -11,7 +9,6 @@
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.StoryBookContributionEvent;
 import ai.elimu.model.enums.PeerReviewStatus;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.rest.v2.service.StoryBooksJsonService;
 import ai.elimu.util.DiscordHelper;
 import ai.elimu.web.context.EnvironmentContextLoaderListener;
@@ -44,12 +41,6 @@ public class StoryBookParagraphEditController {
     @Autowired
     private StoryBookParagraphDao storyBookParagraphDao;
     
-    @Autowired
-    private AudioDao audioDao;
-    
-    @Autowired
-    private AudioContributionEventDao audioContributionEventDao;
-    
     @Autowired
     private StoryBooksJsonService storyBooksJsonService;
 
@@ -108,7 +99,6 @@ public String handleSubmit(
                 storyBookContributionEvent.setParagraphTextAfter(StringUtils.abbreviate(storyBookParagraph.getOriginalText(), 1000));
             }
             storyBookContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            storyBookContributionEvent.setPlatform(Platform.WEBAPP);
             storyBookContributionEventDao.create(storyBookContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/word/WordCreateController.java b/src/main/java/ai/elimu/web/content/word/WordCreateController.java
index 1673dd4d0..9ae8d8da4 100644
--- a/src/main/java/ai/elimu/web/content/word/WordCreateController.java
+++ b/src/main/java/ai/elimu/web/content/word/WordCreateController.java
@@ -6,8 +6,6 @@
 import javax.validation.Valid;
 
 import org.apache.logging.log4j.Logger;
-import ai.elimu.dao.AudioContributionEventDao;
-import ai.elimu.dao.AudioDao;
 import ai.elimu.dao.EmojiDao;
 import ai.elimu.dao.ImageDao;
 import ai.elimu.dao.SyllableDao;
@@ -21,7 +19,6 @@
 import ai.elimu.model.content.multimedia.Image;
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.WordContributionEvent;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.model.v2.enums.content.SpellingConsistency;
 import ai.elimu.model.v2.enums.content.WordType;
 import java.util.ArrayList;
@@ -66,12 +63,6 @@ public class WordCreateController {
     
     @Autowired
     private WordContributionEventDao wordContributionEventDao;
-    
-    @Autowired
-    private AudioDao audioDao;
-    
-    @Autowired
-    private AudioContributionEventDao audioContributionEventDao;
 
     @RequestMapping(method = RequestMethod.GET)
     public String handleRequest(Model model, @RequestParam(required = false) String autoFillText) {
@@ -137,7 +128,6 @@ public String handleSubmit(
             wordContributionEvent.setRevisionNumber(word.getRevisionNumber());
             wordContributionEvent.setComment(StringUtils.abbreviate(request.getParameter("contributionComment"), 1000));
             wordContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            wordContributionEvent.setPlatform(Platform.WEBAPP);
             wordContributionEventDao.create(wordContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/java/ai/elimu/web/content/word/WordEditController.java b/src/main/java/ai/elimu/web/content/word/WordEditController.java
index 87adadf37..de523ef71 100644
--- a/src/main/java/ai/elimu/web/content/word/WordEditController.java
+++ b/src/main/java/ai/elimu/web/content/word/WordEditController.java
@@ -5,7 +5,6 @@
 import javax.validation.Valid;
 
 import org.apache.logging.log4j.Logger;
-import ai.elimu.dao.AudioContributionEventDao;
 import ai.elimu.dao.AudioDao;
 import ai.elimu.dao.EmojiDao;
 import ai.elimu.dao.ImageDao;
@@ -24,7 +23,6 @@
 import ai.elimu.model.content.multimedia.Image;
 import ai.elimu.model.contributor.Contributor;
 import ai.elimu.model.contributor.WordContributionEvent;
-import ai.elimu.model.enums.Platform;
 import ai.elimu.model.v2.enums.content.SpellingConsistency;
 import ai.elimu.model.v2.enums.content.WordType;
 import java.util.ArrayList;
@@ -76,9 +74,6 @@ public class WordEditController {
     @Autowired
     private WordPeerReviewEventDao wordPeerReviewEventDao;
     
-    @Autowired
-    private AudioContributionEventDao audioContributionEventDao;
-    
     @Autowired
     private StoryBookParagraphDao storyBookParagraphDao;
 
@@ -186,7 +181,6 @@ public String handleSubmit(
             wordContributionEvent.setRevisionNumber(word.getRevisionNumber());
             wordContributionEvent.setComment(StringUtils.abbreviate(request.getParameter("contributionComment"), 1000));
             wordContributionEvent.setTimeSpentMs(System.currentTimeMillis() - Long.valueOf(request.getParameter("timeStart")));
-            wordContributionEvent.setPlatform(Platform.WEBAPP);
             wordContributionEventDao.create(wordContributionEvent);
             
             if (!EnvironmentContextLoaderListener.PROPERTIES.isEmpty()) {
diff --git a/src/main/resources/META-INF/jpa-schema-export.sql b/src/main/resources/META-INF/jpa-schema-export.sql
index 9d3e2e24e..cee5348cf 100644
--- a/src/main/resources/META-INF/jpa-schema-export.sql
+++ b/src/main/resources/META-INF/jpa-schema-export.sql
@@ -204,7 +204,6 @@
     create table AudioContributionEvent (
        id bigint not null auto_increment,
         comment varchar(1000),
-        platform varchar(255),
         revisionNumber integer,
         time datetime,
         timeSpentMs bigint,
@@ -334,7 +333,6 @@
     create table ImageContributionEvent (
        id bigint not null auto_increment,
         comment varchar(1000),
-        platform varchar(255),
         revisionNumber integer,
         time datetime,
         timeSpentMs bigint,
@@ -358,7 +356,6 @@
     create table LetterContributionEvent (
        id bigint not null auto_increment,
         comment varchar(1000),
-        platform varchar(255),
         revisionNumber integer,
         time datetime,
         timeSpentMs bigint,
@@ -406,7 +403,6 @@
     create table LetterSoundCorrespondenceContributionEvent (
        id bigint not null auto_increment,
         comment varchar(1000),
-        platform varchar(255),
         revisionNumber integer,
         time datetime,
         timeSpentMs bigint,
@@ -448,7 +444,6 @@
     create table NumberContributionEvent (
        id bigint not null auto_increment,
         comment varchar(1000),
-        platform varchar(255),
         revisionNumber integer,
         time datetime,
         timeSpentMs bigint,
@@ -493,7 +488,6 @@
     create table SoundContributionEvent (
        id bigint not null auto_increment,
         comment varchar(1000),
-        platform varchar(255),
         revisionNumber integer,
         time datetime,
         timeSpentMs bigint,
@@ -529,7 +523,6 @@
     create table StoryBookContributionEvent (
        id bigint not null auto_increment,
         comment varchar(1000),
-        platform varchar(255),
         revisionNumber integer,
         time datetime,
         timeSpentMs bigint,
@@ -666,7 +659,6 @@
     create table WordContributionEvent (
        id bigint not null auto_increment,
         comment varchar(1000),
-        platform varchar(255),
         revisionNumber integer,
         time datetime,
         timeSpentMs bigint,
diff --git a/src/main/resources/db/migration/2004004.sql b/src/main/resources/db/migration/2004004.sql
new file mode 100644
index 000000000..81b25a497
--- /dev/null
+++ b/src/main/resources/db/migration/2004004.sql
@@ -0,0 +1,10 @@
+# 2.4.4
+
+ALTER TABLE `AudioContributionEvent` DROP COLUMN `platform`;
+ALTER TABLE `ImageContributionEvent` DROP COLUMN `platform`;
+ALTER TABLE `LetterContributionEvent` DROP COLUMN `platform`;
+ALTER TABLE `LetterSoundCorrespondenceContributionEvent` DROP COLUMN `platform`;
+ALTER TABLE `NumberContributionEvent` DROP COLUMN `platform`;
+ALTER TABLE `SoundContributionEvent` DROP COLUMN `platform`;
+ALTER TABLE `StoryBookContributionEvent` DROP COLUMN `platform`;
+ALTER TABLE `WordContributionEvent` DROP COLUMN `platform`;