Need testers for ios beta app 😭

This is my first ever app. I really need some feedback. So far I've got one rude comment on reddit haha.

It's a guided breathing app, which is:
✅ Based on research
✅ Highly customisable
✅ Runs on iPhone, iPad and Apple Watch
✅ Has interesting visuals for the breathing exercise

I would really really really appreciate any and all feedback! Thank you so much 😊

TestFlight link