Before you can A/B test your mobile app, register it with VWO.
Registering an app is a one-time process.
From the Test menu, select Mobile App A/B.
Click APPS in the upper-right corner of the page.
Click on CREATE APP on the right-hand side.
Type the name of your app and click CREATE.
After you create an app, you can see the iOS and Android
API Key for both the platforms.
You will use this API Key during app initialisation.