ClockMaster for Android

My ship’s bell clock had been running almost a minute-a-day off for years. With a few iterations of this app it’s now within a second a day!

I’m a clock’s collector so I always do servicing and repairing pendulum clocks. Since I have got the app (one year ago), I found the app indeed very helpful for me to make pendulum clocks beat and work accurately. It will take short time to adjust accuracy of clock if you know BM/BH of it otherwise you note current BM/BH then wait for the clock working for 24 hs and base on accuracy of clock you calculate actual BM/BH then adjust clock work with the new BM/BH. Before when I didn’t have the app, it took me almost one week to make clocks work perfectly. Please share me if any other app is better this app.

Update: the latest rewrite has made this app useless. If I could, I would restore the old version. It used to work quit well. Now useless.

I inherited a 114 year old Ithaca grandfather clock with a Griffith movement and used this program to tune the movement. After getting into the clock, I found that it was not set up correctly and didn’t work at all. After figuring out how it was supposed to be set up, I used the program to set the beat and regulation. I started out with zero knowledge on how a clock works and muddled through the process with the end result being a clock that keeps time. Hurray. The only issue I had was that the auto function for estimating the target rate (for BPH) did not work on this clock at all. I did calculate the actual BPH from counting the number of gears and pivots in the gear train and with the correct BPH imputed, the app worked perfectly. I did splurge on the external Peterson pitch grabber which was money well spent($15 at Amazon).

I used this to calibrate my cuckoo clock. It picked up the pendulum clicks just fine using the internal mic, with no need for an external mic or sensor. I'm definitely no horologist, but this seemed to do the job. When I had a problem due to an iOS version issue, the developer responded within a few minutes and had a fix quickly. It would be nice to have plots to look at drift rate and periodic error. These are available in the Pro version, but even in that it will not make plots - just allow you to export the data to a file to be viewed elsewhere. Would be better to have the plots right in the app.