Clock Tuner

    Clock Tuner icon

    Clock Tuner

    by: 348 6.8

    6.8 Users



    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,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

    ** You may provide sound sample by sending wav or mp3 file to

    Tags: clock tuner , timegrapher mechanical , timegrapher apps , mesurer fréquence pendule , timegrapher , clock tuning , reloj pendulo , violin tuner clock , clock tune

    Users review

    from 348 reviews



    Users comments

    Michael Grambihler

    by Michael Grambihler

    Feb 17, 2017  |  "Poor"


    jp kossman

    by jp kossman

    Jan 19, 2017  |  "Poor"

    Can't tell if it works premium only for detected frequency

    Dan Lavalier

    by Dan Lavalier

    Dec 08, 2016  |  "Awesome"

    Other apps can not hear the ticks this one could. Suggest using a external mic. Put mic on back of watch. Strapped watch to watch pillow. So mic is between watch back and pillow. Put both in small box for more sound proofing. Got measurements. Then paid and received frequencies and variance. Can now check watches, portable.

    Walter Osborne

    by Walter Osborne

    Dec 08, 2016  |  "OK"

    Recommend not going "premium", they need to do a bit more to get this where it needs to be.

    Justin Rossetti

    by Justin Rossetti

    Nov 18, 2016  |  "OK"

    It seems like it should work, but doesn't work as advertised - there's no 'pendulum', or feature to see how off my clock is - instead there's the text 'Get Pro'. That's pretty misleading, you apparently don't really want my $5, do ya? Make it work as advertised, and I'll gladly pay. Until then, I've reported this app for "Deceptive Behavior', which violates google policy.

    Igor Berezin

    by Igor Berezin

    Nov 02, 2016  |  "Poor"

    Only feature useful and is disabled on ad version