Is that it?
Amber (Nostr event signer for Android)
https://f-droid.org/packages/com.greenart7c3.nostrsigner/
Login to reply
Replies (1)
Found a newer version in nostr:nprofile1qqs83nn04fezvsu89p8xg7axjwye2u67errat3dx2um725fs7qnrqlgpzamhxue69uhhyetvv9ujumn0wd68ytnzv9hxgtcsrhspy :)
Installing.