blackcat (nprofile…7a7m) Device and strong integrity require a Google certified device running the unmodified stock OS. Basic is expected to pass when logged into a Google account which can be a purpose-specific throwaway but those won't.
GrapheneOS has a feature intercepting Play Integrity API requests and it uses that to show a notice when an app uses it so you would know if the app was using Play Integrity API. If there isn't a notification, it isn't.
GrapheneOS
npub123…g0ht5
2026-07-22 17:32:31 UTC
in reply to nevent1q…s3p7
Author Public Key
npub1235tem4hfn34edqh8hxfja9amty73998f0eagnuu4zm423s9e8ksdg0ht5Seen on
wss://ditto.pub/relayPublished at
2026-07-22 17:32:31 UTCEvent JSON
{
"id": "7c7ac3757798c9052c649c701076b4d9396062fca7f300ad076f81726e6e9929",
"pubkey": "5468bceeb74ce35cb4173dcc9974bddac9e894a74bf3d44f9ca8b7554605c9ed",
"created_at": 1784741551,
"kind": 1,
"tags": [
[
"p",
"242d60a4a2508d9592adf98050cc7ed0b6fdc3e9eccb32d4bc9dcae6f4c11b4f",
"wss://relay.ditto.pub"
],
[
"e",
"ee6d03c0af3d22e92aa0a46214024fdfa70c9557b9baef1e63fed2e2a02539a7",
"wss://relay.ditto.pub",
"reply"
],
[
"proxy",
"https://grapheneos.social/users/GrapheneOS/statuses/116964822328106374",
"activitypub"
],
[
"client",
"Mostr",
"31990:6be38f8c63df7dbf84db7ec4a6e6fbbd8d19dca3b980efad18585c46f04b26f9:mostr",
"wss://relay.ditto.pub"
]
],
"content": "nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqyskkpf9z2zxety4dlxq9pnr76zm0mslfan9n949unh9wdaxprd8s8q7a7m Device and strong integrity require a Google certified device running the unmodified stock OS. Basic is expected to pass when logged into a Google account which can be a purpose-specific throwaway but those won't.\n\nGrapheneOS has a feature intercepting Play Integrity API requests and it uses that to show a notice when an app uses it so you would know if the app was using Play Integrity API. If there isn't a notification, it isn't.",
"sig": "650e1d2837fe71603a0bbfa2bef92dacf09574c07a865206b1fe95b4b0a5634bd07cb144fb8bfb8c3b98a43a55e740433b0ded1505d819f1be78f7130a9c8385"
}