Senstroke is a great concept, really, and I was excited to try it. But I’m on android and sadly, after trying a few devices I can see that the latency is just too long to make it work for real drumming practice. I even tried it with a Raspberry Pi with a super-low-latency sound card (Pisound) but that’s still just a little bit too slow (plus the angle-to-midi-note function didn’t seem to be working very well, but I didn’t go any further with that problem).
Not a complaint really, it’s to be expected. My own view is that you should specify an iOS device in the hardware requirements.