Watch Accuracy Meter

Watch Accuracy Meter

About this app

Estimate the accuracy of mechanical watches using the phone microphone.

Estimations in 60 seconds
- Beats per hours
- Rate (seconds/day)
- Beat Error (ms)
- Amplitude
No external hardware required
Multiple measurement screens
Multiple detection algorithms
Should work even if a small amount of background noise is present
Beats per hour setting.
Lift angle setting
Saving and comparing multiple results

The measured values for the same watch can very depending on:
- The position of the watch.
- The power reserve of the watch.

This app was built for watches and may not work for clocks.

The measured values are estimation and can be different from the actual ones.

Ratings and reviews

Great app. Been using it for awhile. However, after the latest update, the Rate and Beat Error boxes remain blank, (only displaying a short horizontal line). 2026 Update: Still a good app. for daily accuracy check. Beat error is suspect when compared to an actual timegrapher. Amplitude remains blank for the most part for all my watches. Could just be my phone microphone.

No ads and seems to well and consistently. Easy to use and to get started. No fluff and does exactly what you expect to it too. I'm surprised this is a free app. I wouldn't minding paying a few bucks for it, but I'm grateful it is free, especially for no ads. There is room for improvement though. The graph should have a self center function, and in the quick start guide it should show how to position the watch to best monitor the beat.

I'm lowering my rating to 2 stars. It just keeps getting worse. The amplitude reading is completely broken on high-beat movements now. There's also no way to hide the amplitude reading for cases when you don't know the lift angle and would rather not show the wrong amplitude, or you just want to hide it because it's not detected. Also, the save feature with trace is broken. The line is not saved where you position it, nor is it saved with the render screen you selected in the settings.

What’s new

Small fix.