Watch Tuner Timegrapher 4+

The app works very well, if you feed it quality sound it will give accurate results and the settings are finely tuneable. Getting quality sound to the app is a physics problem, not an app problem. I have only used the standard Apple wired earphones and it is consistently good, but you need a quiet space. I set up in a quiet room and put the watch and microphone section of the earphones under a pillow. This gives me reliable, repeatable results with the standard settings. I have used this set up with a movement out of the case and with movements that are still in the watch case. For cased movements I have just used sticky tape to hold the microphone on the case back. For un-cased movements, sitting the microphone very close is sufficient. For hobbyists that can’t justify the cost of a dedicated physical Timegrapher, this app is an excellent alternative at 1/10 the cost.

I was getting very frustrated with this app, then I tried using my Bose Quiet Comfort wired earbuds, which have a microphone you can precisely locate and which I suspect is a lot better quality than the one in the standard Apple earbuds. Suddenly, Wow! Readings perfectly consistent with ones done by observing over 24 hours, and showing how the watch runs in every position. Fantastic! If you’re getting frustrated, try a better mic. Probably doesn’t need Bose, just better.

I wanted to adjust my Seiko SKX009 so not worth buying a stand alone Timegrapher. I tried the Apple earpods but you had to be very very quiet, not really great but fortunately I had a pair of Bose QC20 and after getting the settings correct on the app it managed to work perfectly.
Thank you for the app. 👍