I've just released v1.2.1, which I think should fix most of the mobile issues 🙂 If you're still seeing issues, please let me know.
Haven't had a chance to work on the read indicator yet, sorry. I'd like to make an option to disable read indicators, and roll that work into a single release.
I think it'd be cool to support having multiple people in a single chat, but honestly, I think that's a long way off.
I'm working on adding support for sending email notifications when a private message is received 🙂