I am a pro drummer and have used Tempi in performance quite a bit. It is a great safety net and really helps to me to feel solid in a very natural way. My time feels much more consistent and confident after when I remove it from the equation as well! I have a few minor suggestions, but bravo on what has become one of my most efficient tools! I only have a couple minor suggestions.
I love that it records, but it would be great to have the option to not record. Recording drains the battery very quickly, thus making it unusable for longer recordings if you cannot plug in your device.
Also, it would be amazing to be able to minimize Tempi while being able to use another app simultaneously. ie. sheet music app, fourscore, etc.
I recommend it to my students and colleagues. People are always amazed and wonder why they have never heard of it! As is, it is still incredible and I will continue to utilize and recommend it to anyone that may benefit. Thank you for the wonderful tool!