Reference:
- Apple: https://developer.apple.com/app-store-connect/analytics/
To view your mobile app analytics you must request access to the App Store and Google Play store dashboards. Use this form: https://go.peoplevine.com/form/4604.
Once your form is filled watch out for two invitations in your inbox, one to the App Store and another for the Google Play store.
App Store Analytics
Login to https://appstoreconnect.apple.com/ and navigate to the analytics page.
There you should see your app listed.
Refer to Apple documentation for detailed usage of Analytics dashboard: https://developer.apple.com/app-store-connect/analytics/.
Play Store Analytics
Login to https://play.google.com/console/developers and navigate to your app.
Once your app is selected, navigate to the Statistics dashboard.
Refer to Google's documentation for detailed usage of app statistics: https://play.google.com/console/about/stats/.