Downloaded this due to my OTT frustration with my brand new Seiko automatic being 9 sec a day slow, very consistently. It would run a bit slower on my wrist than dial up off wrist overnight. So, trialling this app I went about trying to get the app to confirm the observed watch accuracy, which it did! It also picked the correct BPH easily every single time. I was able to set the watch a bit faster with the help of the app aiming for 1sec a day slow knowing off wrist it would regain the time lost overnight. It has been 3.5 days since the adjustment and the Seiko is absolutely spot on within half a second of the atomic clock. Well done for creating an amazing, simple app, that works with the standard built in microphone on my OnePlus3T, and doesn't even need absolute total silence to work well. Thank you.
Nice app.Using PRO version, able to regulate Miyota 9100 auto + 3 sec and Swiss auto +1 sec. User manual along with video must be added. Use good quality mike, calibrate the device,wait for waveform to be appeared in green spikes, keep patience, it would work perfectly. I am happy. Highly recommended. Yes...Five Star. Update : Review : After one month of usage... It's nice accurate app. Love it.. Five Star once again.
That's the only free app that worked for me. Gives you for free the basic mechanical watch metric: accuracy in seconds/day. Just use a good mic and you get results. No ads, pay if you need extra functionality. Fair and square
This app works very well...you need to let it calibrate itself as required in a very quiet environment and it will achieve remarkable readings. I used it to regulate my Bostok Amphibia which beats at 19,800 bph and after a few adjustments to the regulator arm I achieved 0 to +1 seconds per day...!!! I honestly do recommend this app and it's free..!!!
works but could do with sensitivity control and use fast Fourier transform to filter the watch movement sounds
Unreliable with Samsung Galaxy 3, zero documentation, virtually zero functionality unless you pay, don't bother. Uninstalled.