Using what I've learned from using the mobile app for several months and hearing from others, I think a UI redesign could help solve several key issues.
The Bluetooth connection screen is hard to find
The App stores values, but so does the Pi. A disconnect/reconnect confuses the state
Multiple OpenTrickler (pi) devices should be supported
If the Bluetooth connection fails during usage, it's not obvious
The text input box can be a little clunky. Setting it the first time is fine, but changing a set value is weird.
Using what I've learned from using the mobile app for several months and hearing from others, I think a UI redesign could help solve several key issues.