Preparing Your App
Preparing iOS App Files
Follow these instructions to prepare an iOS app for upload.
Save a .zip file containing your compressed .app bundle. Your .app bundle must represent a simulator build of your app. Look in your XCode directory for: ~/Library/Developer/Xcode/DerivedData/[project-name]/Build/Products/Debug-iphonesimulator/
Alternatively, you may run xcodebuild -sdk iphonesimulator in your project directory, then zip the .app bundle in build/Release-iphonesimulator/.
Preparing Android App Files
Follow these instructions to prepare your .apk file containing an emulator build of your app for uploading.
Build your app either via Android Studio or by running the command ./gradlew assembleRelease in your project directory. It will be stored in /[project-name]/[module-name]/build/outputs/apk/.