diff --git a/frontend/src/taxonomy/core-filter-definitions-by-group.json b/frontend/src/taxonomy/core-filter-definitions-by-group.json
index 8015c443138c..1d71f729946c 100644
--- a/frontend/src/taxonomy/core-filter-definitions-by-group.json
+++ b/frontend/src/taxonomy/core-filter-definitions-by-group.json
@@ -1286,6 +1286,13 @@
             "examples": ["3"],
             "label": "Feature flag version"
         },
+        "$flutter_version": {
+            "description": "The Flutter version of the app that captured the event.",
+            "examples": ["3.44.1"],
+            "ignored_in_assistant": true,
+            "label": "Flutter version",
+            "system": true
+        },
         "$geoip_accuracy_radius": {
             "description": "Accuracy radius of the location matched to this event's IP address (in kilometers).",
             "examples": ["50"],
@@ -2084,6 +2091,13 @@
             "examples": ["Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko)"],
             "label": "Raw user agent"
         },
+        "$react_native_version": {
+            "description": "The React Native version of the app that captured the event.",
+            "examples": ["0.79.6"],
+            "ignored_in_assistant": true,
+            "label": "React Native version",
+            "system": true
+        },
         "$recording_status": {
             "description": "The status of session recording at the time the event was captured",
             "label": "Session recording status",
@@ -5145,6 +5159,13 @@
             "examples": ["3"],
             "label": "Feature flag version"
         },
+        "$flutter_version": {
+            "description": "The Flutter version of the app that captured the event.",
+            "examples": ["3.44.1"],
+            "ignored_in_assistant": true,
+            "label": "Flutter version",
+            "system": true
+        },
         "$geoip_accuracy_radius": {
             "description": "Accuracy radius of the location matched to this event's IP address (in kilometers). Data from the last time this user was seen.",
             "examples": ["50"],
@@ -6269,6 +6290,13 @@
             "examples": ["Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko)"],
             "label": "Latest raw user agent"
         },
+        "$react_native_version": {
+            "description": "The React Native version of the app that captured the event.",
+            "examples": ["0.79.6"],
+            "ignored_in_assistant": true,
+            "label": "React Native version",
+            "system": true
+        },
         "$recording_status": {
             "description": "The status of session recording at the time the event was captured",
             "label": "Session recording status",
diff --git a/posthog/taxonomy/taxonomy.py b/posthog/taxonomy/taxonomy.py
index 625a673c7bb0..442e45ca2dce 100644
--- a/posthog/taxonomy/taxonomy.py
+++ b/posthog/taxonomy/taxonomy.py
@@ -817,6 +817,20 @@ def visible_definitions(group: str) -> Iterator[tuple[str, CoreFilterDefinition]
             "system": True,
             "ignored_in_assistant": True,
         },
+        "$react_native_version": {
+            "label": "React Native version",
+            "description": "The React Native version of the app that captured the event.",
+            "examples": ["0.79.6"],
+            "system": True,
+            "ignored_in_assistant": True,
+        },
+        "$flutter_version": {
+            "label": "Flutter version",
+            "description": "The Flutter version of the app that captured the event.",
+            "examples": ["3.44.1"],
+            "system": True,
+            "ignored_in_assistant": True,
+        },
         "$sdk_debug_replay_internal_buffer_length": {
             "label": "Replay internal buffer length",
             "description": "Useful for debugging. The internal buffer length for replay.",