Clock Tuner

In-app purchases
3.0
1.73K reviews
100K+
Downloads
Content rating
Everyone
Screenshot image
Screenshot image
Screenshot image

About this app

A Timegrapher

This app is to measure the BPH(Beats per hour) of mechanical watches.
It will display time error per day as well.

The app uses microphone to measure BPH.

** Recommend to plug a microphone into phone and attach the microphone to the back of your watch.
** Basic version display wave graph and pulse interval histogram.
** Frequency display requires 'Premium' upgrade.

** Please test the app with your watch before you purchase 'Premium' upgrade. The app will work as Premium during 30 min.

Not for digital clocks.
Not working in noisy environment.
Set microphone direction toward a clock.

- Review from Mr. Kojima
http://www.thewatchsite.com/index.php/topic,42142.0.html

- Preset example
Rolex or mechanical watch: Target frequency: 4 or 5Hz, Sample duration: 2Sec, Sensitivity: manual 50
Most pendulum clock: Target frequency: 1 or 2 Hz, Sample duration: 5 or 10 Sec, Sensitivity: medium

FAQ.
1) in the settings there is a sensitivity option with a high, medium, low and 3 manual settings, can you explain how this changes the results

It determines sound amplitude threshold for detecting clock sound. If your clock sound is loud you may reduce sensitivity. This will allow more environmental noises.
If you increase the sensitive, you may measure hand watches. But small noise may measurement errors.

2) why does the detected frequency change between light grey, black and red
Red means smaller drift during the measurement interval while grey means that measurement may have an error.

3) the average frequency does not always calculate, it stays at NaN
The 'detected frequency' should be red continuously.

4) how do you calculate the pulse drift %
abs(max detected frequency - min detected frequency) / detected frequency during 1 detection cycle.

5) what are the 2 graphs showing and what data are you using for the calculations
The size of bars in the upper graph should be almost the same.
The bottom shows amplitude of sound wave recorded from micro phone.

6) are newer versions of the app being developed

** You may provide sound sample by sending wav or mp3 file to admin@athumbcut.com
Updated on
Dec 18, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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Ratings and reviews

3.1
1.66K reviews
A Google user
December 31, 2018
this app doesn't work. i'm trying to tune a grandfather clock. the app records all the ticks properly but doesn't give me ANY useful info. it looks like the app is supposed to show actual frequency, beat error, etc, but nothing happens. all it does is show a plot of the recorded ticks. once got it set for 60 bpm, and high sensitivity. nothing but the plot. i wish it would work.
25 people found this review helpful
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A Google user
February 12, 2020
Don't waste your money, it's a scam. Looked good at first but after paying $4.99 for the full version and using it a while, I noticed that everything is either dead on or +/- 7, 15, 21,28, 35 etc. seconds per day. Tried several watches from 18-28.8kbph and with the exception of 15, the error rate was always in multiples of 7. Their website is dead, no response from the email either....
18 people found this review helpful
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A Google user
February 21, 2019
Very simple and effective. Detects beats per hour with phone microphone set against watch case, which is all you really need. I use it to make fine adjustments, and with a little practice you can tune very easily. I tried others which would not detect the ticking and were far more complicated than necessary for simple regulation.
6 people found this review helpful
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What's new

Chart drawing bug is fixed.