Timegrapher X für iOS & Android

Very good App that does the same as the typical hardware tools. I wanted to check and adjust my mechanical watch but didn’t want to buy an extra timegrapher hardware tool for more than 100 EUR as it would only be occasionally used. Although the App recommends to use an Airpod as a microphone just slightly pushing the the crone of the watch to the phone’s microphone just worked for me. Reliable and even there was a hit of background noise in the room it measured very stable. 100% recommendation.