Comment by dylan604
2 days ago
I'd assume they would have a record of the user in their database. How else would they earn money from the data harvesting their app is a cover for? For the small number of apps that aren't solely data harvesting, surely they still have records of their users in a database as well? This question almost reads as if you're assuming the only record of an app would be through the store and not by the app developers themselves. I would find that truly shocking and quite comically sad if true.
It seems like it would be trivial for a user to login to the app acquired from a different store to be able to display a "welcome back" or even something along the lines of a "restore purchases" type of thing.
This can't be reinventing the wheel kind of a thing.
In google play the purchaser information is mostly privatized and hidden from the developer. I assume Amazon is the same.
The only way a developer would know a person is an existing user is if they have a user sign up process inside the app itself.
Using android.content.SharedPreferences, set one singaling the user purchased a license from the Amazon copy of the app, read it from the Google Play app.
It is doable, the main issues is: 1. Getting users to redownload the app from the Play store 2. Maintaining this registration transfer mechanism
I think issue #1 is a big one, how to download a paid app without paying for it? Not everything is freemium.
Shattered Pixel Dungeon was a good example of me paying on one platform, and then applying the upgrade to the free app after downloading on another.
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