Thanks so much for the detailed feedback — we really appreciate you sharing this.
You’re exactly right that the issue is with the Ultimate Guitar Tabs app rather than the pedal itself. Unfortunately, STOMP and STOMP Mini are not compatible with Ultimate Guitar in either version. The app is very inconsistent with Bluetooth pedal commands and, from what we’ve seen, it simply isn’t designed to work reliably with Bluetooth page turners.
STOMP and STOMP Mini work best with apps that properly support Bluetooth keyboard commands, and we’re always happy to help point players toward options that work more reliably.
Thanks again for giving both pedals a try and for taking the time to share your experience!