Clock Tuner

Clock Tuner

5,000 - 10,000 downloads

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View bigger - Clock Tuner for Android screenshot
View bigger - Clock Tuner for Android screenshot
View bigger - Clock Tuner for Android screenshot
A Timegrapher

Adjust your mechanical clock by your self.
Just run this app on your phone and put your phone near your cuckoo clock or grandfather clock.

This tuner samples and analyze clock sound to displays the frequency of pendulum in real time.
You can easily measure clock frequency to adjust pendulum.

My Galaxy Nexus detects the pulse of Rolex Datejust in calm environment.

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

** Basic version display wave graph and pulse interval histogram.
** Frequency display requires 'Premium' upgrade.
** Do not upgrade if the 'Basic' version fail to display pulse interval histogram.

- Review from Mr. Kojima,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

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
I'm planning of better sound filtering logic. Not done yet.

Tags: timegrapher apps, timegrapher mechanical, reloj pendulo, clock tuner, mesurer fréquence pendule, clock tuning, clock tuner mobiles, app reloj mecánico, mechanical clocks phones, measure clock pendulum period.

Recently changed in this version

v 1.9
- Beat monitor added
- Improved accuracy

v 1.8
- Improved noise filter

v 1.7
- More recognizable color for display.
- Target frequency uses same Time Unit as Detected frequency.
- Make BPH default.

Comments and ratings for Clock Tuner
  • (48 stars)

    by Mark Ruyle on 19/04/2014

    Had trouble updating to pro. Some glitches but works well once I deleted rebooted and installed the pro on my tablet. Does what it says and the graphics are great. Has good pick up without a dedicated mic. Gives beat error and BPH or BPM. Does what it says. Works with watches and clocks. Despite some glitches it is worth what I paid. The graphics are what really make it good. Really well done.

  • (48 stars)

    by Dustin Paddock on 11/04/2014

    I first hated this app because it said the "goal BPM was 60.00." So I try to adjust my Ansonia mantle clock to that... only to realize it threw off the accuracy completely. I started from scratch, manually, guessing. Then when I got it close I used the app to simply tell me what BPM it was running at. I would take note of that frequency, then adjust, trying to get closer. Repeat, and repeat..

  • (48 stars)

    by Justin Smith on 10/04/2014

    I should have read the reviews. As others have mentioned it shows the beat frequency as half what it should be and the beat error function doesnt work.

  • (48 stars)

    by Bazsó-Dombi András on 26/03/2014

    Without buying, you can't use it really for anything useful, as the beat frequency is only shown if you buy it. But do NOT buy it, because it's buggy. It does not show the beat error for any of my 10 mechanical watches. Oddly it shows the beat error for a battery-based watch. I wrote to developer several weeks ago, he cares not to respond. Also, it does not realize that you bought the premium vers

  • (48 stars)

    by Aaron Ng on 06/03/2014

    Works fine, however, the frequency detected is half of the actual and the beat error just shows "N/A" all the time and never shows the error value.

  • (48 stars)

    by Dave Baker on 04/03/2014

    Don't know if it works as the demo version shows no indication of frequency detected and the target frequency doesnt seem to be adjustable. Trying to test an old mantle clock rated at 178.28 beats per minute, or 10696.8 beats per hour. Can't see any way to set it manually apart from the preset frequencies. Not paying for it to find out if it works or not.

  • (48 stars)

    by Mark Jordan on 03/02/2014

    I don't know what datum this takes from the device but it is not correct on the Xperia S. I have a grandfather Clock running slow. BMP on this app shows 66, but that would mean it runs fast. IMHO it is a pretty useless app as it is incorrect on every Clock I have tried.