HodlHodl I’ve successfully used iPhone and Android and Robosats I’ve used over Tor on Android haven’t been able to get it to work on iPhone.

Android phone? Check out AgoraDesk. P2P similar to HodlHodl but requiring even less info. Don't even need an email. They have an open source app too.

I assume you don't want kyc? Because Kraken has an amazing mobile app and is a solid solid exchange!