Clock Tuner

Clock Tuner


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

Recent changes:
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.
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Free
60
3.0
User ratings
68
Installs
5,000+
Concerns
0
File size
903 kb
Screenshots
Video of Clock Tuner Screenshot of Clock Tuner Screenshot of Clock Tuner Screenshot of Clock Tuner

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

Recent changes:
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.

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User reviews of Clock Tuner
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Android Market Comments
A Google User
Jul 3, 2014
Crashes system Had to remove battery to recover system after I changed sample time to 10 sec. App seems to work otherwise but is kind of useless without premium version.
A Google User
Apr 19, 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.
A Google User
Apr 11, 2014
Grew to appreciate it 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... until I could lock down my clock's frequency to around 73.65 BPM. ...and it can even go more accurate than that! So forget the non-adjustable 60 BPM guideline, unless that happens to be for your clock. But using it to simply tell you your clock's frequency - it should get 5 stars just for that - as it does it extremely well, and as far as I know is the only Android app with this feature. I'd like to see the guideline BPM be changeable, or even kept with a series of manual presets (if you have more than one clock, and each clock is its own frequency). I'd also love for this app to keep historical data with itself... right now I'm keeping notes of its frequency in other note apps. Without those few things, it has to stay at 3 or 4 stars.
A Google User
Apr 10, 2014
Disappointed 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.
A Google User
Mar 26, 2014
Great idea, poorly executed, waste of money! 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 version if it has no internet connection. Moreover, today it started not realizing that it's the premium version even if I'm connected to the internet. So basically, I bought it, but it thinks that I did not and it does not work. "Error: Failed to query inventory: labResult: Error refreshing inventory (querying prices of items). (response: 6: Error)" And instead of the beat frequency it shows the "Premium Upgrade" button, even though I did buy it. I want my freaking' money back! It is really such a shame, because the idea of such an application is so great! but the developer should take the time and finish it properly. Especially making sure that if you buy it, then it always knows that it was paid for and it works!