Junk I tried it several times on my 600 class electric heli....it gave wild readings weather I had the heli running or not.....its a waist of 4$
Tach We tried this on few helis. Goes from 2300-3000.. won't give a reading. Worst tach I've ever tried.
Really does work. With no heli around it does show random numbers, but with heli running you get a stable graph and you know it's working.
Great app Works great on my MotoX - this app and my Castle software (gov mode) are within 20 rpm or less of one another - on multiple helis. I simply place my phone on the ground about five feet from my heli and let the heli "idle" at mid-stick /zero pitch for approx 20 seconds to get a solid reading. Awesome app.
Demetrius Worked pretty good on my Blade CP Pro. Will be back tomorrow after I test my TRex 600 ESP 8s and TRex 550. Thanks
450 pro Bought this for my friends 700. Tested on my 450 with castle ice and was dead on with my set rpms.