diff --git a/README.md b/README.md
index 224f72d..c62c542 100644
--- a/README.md
+++ b/README.md
@@ -21,11 +21,20 @@ but adds some features and patches to use in GitHub Actions.
 - _Default:_ `.` (top directory).
 - Set to `src` if buildozer.spec is in `src` directory.
 
+## Outputs
+
+### `filename`
+
+Filename of built package relative to repository root.
+
+- Example: `test_app/bin/testapp-0.1-armeabi-v7a-debug.apk`
+
 ## Example usage
 
 ```yaml
 - name: Build with Buildozer
   uses: ArtemSBulgakov/buildozer-action@v1
+  id: buildozer
   with:
     command: buildozer android debug
     workir: src
diff --git a/action.yml b/action.yml
index 4fac757..5b5c12b 100644
--- a/action.yml
+++ b/action.yml
@@ -15,6 +15,10 @@ inputs:
     required: true
     default: .
 
+outputs:
+  filename:
+    description: Filename of built package
+
 runs:
   using: docker
   image: Dockerfile
diff --git a/entrypoint.sh b/entrypoint.sh
index 9dadf1c..6df7fe2 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -26,3 +26,11 @@ fi
 
 # Give access to root
 sudo chown -R root "$GITHUB_WORKSPACE"
+
+# Set output
+if [ ! -d bin ]; then
+  echo ::error::Output directory does not exist. See Buildozer log for error
+  exit 1
+fi
+filename=$(ls bin | head -n1)
+echo ::set-output name=filename::"$INPUT_WORKDIR/bin/$filename"