Don't you guys have to input your private keys into those websites too? Also, isn't Hivesigner centralized? Which means that if it goes down then no one can login. I rather not have a single point of failure in my app.

People will be able to implement whatever feature they want once I opensource the code. I personally do not like using Hivesigner and Keychain. Especially after what happened to TheMarkyMark and the bug he experienced with Keychain.

I prefer to keep things simple.