You can check all your in-app purchases information following the instructions below: 
 
 
iOS
 
1. Open iTunes.
2. Select your username (this should be your e-mail address), and choose “Account”
3. Scroll down to “Purchase History”, and choose “See All”
 
ANDROID
 
1. Enter pay.google.com, then log in with your Google account
2. Tap on “Subscriptions and services”
3. Select "View purchases"