I've been trying to switch away from a closed source authenticator and this ticks most of the boxes. The only thing it's missing is the ability to quickly filter by group. Currently you have to open app -> 3 dot menu -> filter -> select group (4 steps total), whereas the authenticator I'm currently using allows you to side swipe -> select a group (2 steps), or add a shortcut on homescreen that opens the app with the filter enabled (1 step).