diff --git a/mobile/src/main/java/net/activitywatch/android/widget/CategoryTimeWidgetUpdater.kt b/mobile/src/main/java/net/activitywatch/android/widget/CategoryTimeWidgetUpdater.kt
index 6dd4a7e5..fc59f757 100644
--- a/mobile/src/main/java/net/activitywatch/android/widget/CategoryTimeWidgetUpdater.kt
+++ b/mobile/src/main/java/net/activitywatch/android/widget/CategoryTimeWidgetUpdater.kt
@@ -300,11 +300,11 @@ object CategoryTimeWidgetUpdater {
         /**
          * Parse category events from the androidQuery response.
          *
-         * Groups by the full category path, matching the Activity view: aw-webui builds
-         * cat_events with `merge_events_by_keys(events, ["$category"])` and labels them
-         * with `$category.join(" > ")`. Rolling up to the top-level category here would
-         * make per-category times disagree with the Activity view even though the totals
-         * match (ActivityWatch/aw-android#142).
+         * Groups by the top-level category only (`$category[0]`), so subcategories roll
+         * up into a single row (e.g. "Work > Programming" and "Work > Planning" both
+         * contribute to "Work") and every "Uncategorized > *" subcategory collapses into
+         * a single "Uncategorized" row. This matches the widget's compact display; the
+         * Activity view's finer full-path grouping lives elsewhere.
          */
         internal fun parseCategories(jsonResult: String): List<Pair<String, Long>> {
             val categories = mutableMapOf<String, Double>()
@@ -325,11 +325,11 @@ object CategoryTimeWidgetUpdater {
                     val categoryArray = data.optJSONArray("\$category")
                     if (categoryArray == null || categoryArray.length() == 0) continue
 
-                    // Full category path, e.g. ["Work", "Programming"] -> "Work > Programming"
-                    val categoryPath = (0 until categoryArray.length())
-                        .joinToString(" > ") { categoryArray.optString(it, "Uncategorized") }
+                    // Get top-level category (first element only)
+                    val topLevelCategory = categoryArray.optString(0, "Uncategorized")
 
-                    categories[categoryPath] = categories.getOrDefault(categoryPath, 0.0) + duration
+                    // Aggregate time by top-level category
+                    categories[topLevelCategory] = categories.getOrDefault(topLevelCategory, 0.0) + duration
                 }
             } catch (e: Exception) {
                 Log.e(TAG, "Error parsing categories", e)
diff --git a/mobile/src/test/java/net/activitywatch/android/widget/CategoryTimeWidgetUpdaterTest.kt b/mobile/src/test/java/net/activitywatch/android/widget/CategoryTimeWidgetUpdaterTest.kt
index 17ce9a76..d298ee28 100644
--- a/mobile/src/test/java/net/activitywatch/android/widget/CategoryTimeWidgetUpdaterTest.kt
+++ b/mobile/src/test/java/net/activitywatch/android/widget/CategoryTimeWidgetUpdaterTest.kt
@@ -14,13 +14,12 @@ class CategoryTimeWidgetUpdaterTest {
         """[{"cat_events":[${events.joinToString(",")}]}]"""
 
     /**
-     * Regression for ActivityWatch/aw-android#142: the widget rolled every event up to its
-     * top-level category, so subcategories collapsed together and per-category times
-     * disagreed with the Activity view (which groups by the full `$category` path) even
-     * though the totals matched.
+     * The widget groups by top-level category ($category[0]), so subcategories collapse
+     * into a single row. This is the widget's compact display; see
+     * ActivityWatch/aw-android#142 for the discussion.
      */
     @Test
-    fun parseCategories_keepsSubcategoriesSeparate() {
+    fun parseCategories_collapsesSubcategoriesIntoTopLevel() {
         val result = CategoryTimeWidgetUpdater.parseCategories(
             response(
                 catEvent(60.0, "Work", "Programming"),
@@ -28,10 +27,7 @@ class CategoryTimeWidgetUpdaterTest {
             )
         )
 
-        assertEquals(
-            listOf("Work > Programming" to 60_000L, "Work > Planning" to 30_000L),
-            result
-        )
+        assertEquals(listOf("Work" to 90_000L), result)
     }
 
     @Test
@@ -48,15 +44,15 @@ class CategoryTimeWidgetUpdaterTest {
     }
 
     @Test
-    fun parseCategories_mergesRepeatsOfTheSamePath() {
+    fun parseCategories_mergesRepeatsOfTheSameTopLevel() {
         val result = CategoryTimeWidgetUpdater.parseCategories(
             response(
                 catEvent(60.0, "Work", "Programming"),
-                catEvent(15.0, "Work", "Programming")
+                catEvent(15.0, "Work", "Planning")
             )
         )
 
-        assertEquals(listOf("Work > Programming" to 75_000L), result)
+        assertEquals(listOf("Work" to 75_000L), result)
     }
 
     @Test
@@ -70,11 +66,29 @@ class CategoryTimeWidgetUpdaterTest {
         )
 
         assertEquals(
-            listOf("Work > Programming", "Comms", "Media > Video"),
+            listOf("Work", "Comms", "Media"),
             result.map { it.first }
         )
     }
 
+    /**
+     * Regression for ActivityWatch/aw-android#142: with full-path grouping,
+     * ["Uncategorized", "Browser"] and ["Uncategorized", "Games"] became separate rows.
+     * Top-level grouping collapses all "Uncategorized > *" subcategories back into a
+     * single "Uncategorized" row.
+     */
+    @Test
+    fun parseCategories_collapsesUncategorizedSubcategories() {
+        val result = CategoryTimeWidgetUpdater.parseCategories(
+            response(
+                catEvent(20.0, "Uncategorized", "Browser"),
+                catEvent(10.0, "Uncategorized", "Games")
+            )
+        )
+
+        assertEquals(listOf("Uncategorized" to 30_000L), result)
+    }
+
     @Test
     fun parseCategories_keepsSingleLevelCategoriesUnprefixed() {
         val result = CategoryTimeWidgetUpdater.parseCategories(