In order to log you into several Google services like Google Drive or Google Photos, the app can display all accounts and lets you choose one. The accounts are only used for this purpose. The app won’t send the accounts to a 3rd party.
The app uses Google’s AdMob advertising service.
The app displays a message, clearly stating that it collects anonymized data. This data will not be sold to or shared with a 3rd party. The analytics only have the purpose to make the app better and collect crash reports.