For sure primal has a bunker included, that works fine for other clients as well.
But I currently use Amber:
https://f-droid.org/packages/com.greenart7c3.nostrsigner
But I think it is not available on the play store.
But when you are also in the team that wants to https://keepandroidopen.org/
Then using nostr:nprofile1qy88wumn8ghj7mn0wvhxcmmv9uq3wamnwvaz7tmjv4kxz7fwwpexjmtpdshxuet59uqzq7xwd748yfjrsu5yuerm56fcn9tntmyv04w95etn0e23xrczvvrap2lm47 or F-Droid for free software is a good action anyway.