Like many of the previous reviewers, I had issues with my speaker not showing up in the app, but still connecting to my phone and playing music. This latest update didn’t fix that, but I found out how. You have to reset the UE Roll. Just hold the “-“ button and power button until you hear a tone. Then reconnect the BT and it should work with the app again!
Andrewhudson about UE ROLL, v1.5