We've added an initial section to our site with a list of apps explicitly banning using GrapheneOS via the Play Integrity API with links to their Play Store pages:
https://grapheneos.org/articles/attestation-compatibility-guide#apps-banning-grapheneos
We'll gradually expand this list to include many more apps and then we'll link it a lot.
These apps are taking a stand against user privacy security. They're disallowing protecting privacy with tools like our Contact/Storage Scopes and Sensors toggle. They're disallowing protecting against exploits heavily used by authoritarians against their political opposition.
We can add a feature to the sandboxed Google Play compatibility layer for showing a notification when apps use the Play Integrity API. We can then use that to greatly expand the list, and then we can coordinate feedback campaigns to the whole list of apps from our community.
It's hard for us to greatly expand it right now because users reporting an app is disallowing using GrapheneOS isn't quite enough to know it's using the Play Integrity API. They're sometimes implementing their own faulty checks which can usually be worked around with our toggles.
@GrapheneOS This just makes me think of how Authy coincidentally prompted me for a review just after it had abruptly stopped working on my device running #GrapheneOS due to the Play Integrity check. Needless to say, I was not kind.
Oddly, I had not immediately removed Authy, and recently I opened it again to remind myself what the message said when it failed to work, and to my surprise it was functioning again. I just opened it on my phone running 2024120200 and it works. I had been wondering if Authy decided to reverse course at some point and I missed it (though they've burned their bridges with me either way).
