Hi,
My applications are :
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Petanque: Score Marker. A little app to note score during petanque games, with statistics functionalities. This is my most downloaded app (~40000 downloads on Google Play). This one is completely privacy-friendly, its privacy score on /e/ Apps is 9/10. On GPS, the app is free (and ads-free) and users can purchase an item to become “premium members”: by doing this, they can access to advanced functionalities (principally advanced statistics). On /e/, the app crashes if users try to buy the in-app purchase. I must correct this bug, and I was wondering how can I offer to /e/ user the possibility to support the app. This is the origin of this thread
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France Explorateurs. This app is a (serious) game which allow users to discover the most beautiful touristic places in France. It is a geo-located game, as the users must collect virtual “badges”: each touristic place has an associated badge to collect. This app is not privacy-friendly as its score is an horrible 0/10 on /e/ Apps
I think there are several reasons to this :
** I use Google API like Google AdMob, Google Firebase for crash reporting, Google payment…
** I use Facebook API to allow user to share their badges collection to theirs friends
** The app uses high-accuracy location, because the user must be at 50 meters or less from a badge to unlock it.
I developed this app 4 or 5 years ago, and I was clearly less informed and involved in development of user privacy-friendly apps. -
The two others app are not yet available in /e/… I though I asked for their integration, but it seems I did not. I will do this later.
I like the Threema App Shop for buying Threema licenses.
Ok I did not know this system, it could be an alternative. Thank you 
An alternate for such app users and application developer is definitely an interesting option to check out.
Thank you @Manoj !