Clock Tuner




    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 apps , timegrapher mechanical , clock tuning , timegrapher , mesurer fréquence pendule , reloj pendulo , violin tuner clock , free clock tuner

    Users review

    from 426 reviews



    Users comments for Clock Tuner

    A Google user

    by A Google user

    Oct 22, 2017  |  "Poor"

    If it can only be used once for free, then it is useless. Pity 'cause otherwise not bad.

    Steven Tyrer

    by Steven Tyrer

    Sep 18, 2017  |  "Great"

    Works well only issue is the beat Scale is very small and it would be good if it was adjustable.

    Garry Anderson

    by Garry Anderson

    Aug 22, 2017  |  "Great"

    Had an issue originally, can only run once before having to pay. Seems to to a good job, would like to see delta on beat offset. My clock has auto beat setting, but curious. Thanks.

    Jack Zhang

    by Jack Zhang

    Aug 06, 2017  |  "Poor"

    Only work once

    A Google user

    by A Google user

    Jul 29, 2017  |  "Awesome"

    Awesome if your not a moron. It's not perfect but once want argue with the price!

    The Bobster

    by The Bobster

    Jul 23, 2017  |  "Poor"

    Can only use once before it forces purchase. No instructions and just a very poor app in general.