I created a group and wanted to update the name, I was confused by how it worked, I thought I'd type it in and click the back arrow seeing no button. Realized later I have to tap "Done" on my keyboard. You might want to consider adding a green "Done" button below or near the "Delete Group" button even though it's slightly redundant, it's less confusing.

I'm trying it on Android. Not sure how I can convince friends to try this out though, have a hard time getting people to use Signal. How's this compare to iMessage in regards to encryption btw? I know encryption isn't entirely trivial to cover this early on.

Edit: Also when I click "Contacts" and I deny permission on Android it crashes the app. Might want to handle that case.