I wonder why this isn't letting me login via my nip07 on relay.tools.. I guess I need to fire it up in Android studio and see if I can find an error.. it can sign messages right? Not just get pubkey? 

 I just tried it with relay.tools and it worked fine. Yes of course it can sign.
Also there are app logs at the About screen at the top left Spring icon. 

 Oh whoops, I forgot I had spring set to 'read only key' durrr 🙏🎃 whew thanks for helping I was going crazy there trying to figure it out haha.  🤦