I've used hipchat post acquisition by Atlassian. Their android client is shit: it used to absolutely nuke my battery. Post installation, the phone which used

I've used hipchat post acquisition by Atlassian. Their android client is shit: it used to absolutely nuke my battery. Post installation, the phone which used to last 24-30 hours was barely making it six. Slack's mobile app has been great to me in this regard. Also, their mobile sign in flow is amazing. The Android app issue -- and it also happened to another person on my team post acquisition when we were forced to move from Slack to Hipchat -- set up a 6 month long fight over keeping slack. I don't recall ever arguing about a chat app before but this was a dealbreaker.