Nip46 remote signers like nsecbunker.com and nsec.app are really powerful. It opens up all the web clients to mobile use. Idk about you but I won't put my IRL sk into a web app any more.  

 For mobile use Firefox #Android + Alby is the real MVP 

 Looks like a good option but I like being able to use any browser with nostr web clients. I'm a big fan of brave.