diff --git a/src/telemetry/telemetryService.ts b/src/telemetry/telemetryService.ts
index 5fb5c16bf..12ecc5b89 100644
--- a/src/telemetry/telemetryService.ts
+++ b/src/telemetry/telemetryService.ts
@@ -62,7 +62,11 @@ export class TelemetryService {
   }
 
   public getCommonProperties(): Record<string, string | undefined> {
-    return { extension_version: `${version}`, device_id: this.deviceId };
+    return {
+      extension_version: `${version}`,
+      device_id: this.deviceId,
+      app_name: vscode.env.appName || 'Visual Studio Code - Unknown', // e.g., "VS Code" or "Azure Data Studio"
+    };
   }
 
   private async readSegmentKey(): Promise<string | undefined> {
@@ -105,6 +109,7 @@ export class TelemetryService {
       anonymousId: this.anonymousId,
       traits: {
         device_id: this.deviceId,
+        app_name: vscode.env.appName || 'Visual Studio Code - Unknown', // e.g., "VS Code" or "Azure Data Studio"
       },
     };
 
diff --git a/src/test/suite/telemetry/telemetryService.test.ts b/src/test/suite/telemetry/telemetryService.test.ts
index 3cc74aa29..07b325dc4 100644
--- a/src/test/suite/telemetry/telemetryService.test.ts
+++ b/src/test/suite/telemetry/telemetryService.test.ts
@@ -49,6 +49,7 @@ suite('Telemetry Controller Test Suite', () => {
   const commonProperties = {
     extension_version: version,
     device_id: testDeviceId,
+    app_name: vscode.env.appName || 'Visual Studio Code - Unknown',
   };
 
   const sandbox = sinon.createSandbox();