Collect Mobile Build instruction Create a local.properties in project root, containing sdk.dir=[adt-bundle path]/sdk Execute ./gradlew clean build Release instruction Get the keystore with the private key to be used for signing the app Execute ./release. You can optionally specify the version name as an argument, if you want it to be different then previous release: ./release 1.1 Follow the on-screen instructions Once the release finishes, the signed APK is located at android/build/outputs/apk/Collect.apk