After many years of service the ClockMaster app gets a major update. This is a rewrite from scratch actually, with lots of major improvements such as long-term tests, target beat rate database and more. To illustrate some of the new capabilities, here is a video of 10+ hour long measurement of a 1923 Junghans Mantel Clock.
The public beta release is now available for download on TestFlight. The updated documentation is here. Also check out the beat rate calculator. Your feedback is welcome!