Clock Tuner is a timegrapher style app that uses your phone's microphone to measure the Beats Per Hour and daily time error of mechanical watches. The free version provides wave and pulse visualizations, while the frequency display is unlocked with Premium; latest updates open all features by default. Not ranked in any top list, it has a mature user base with 100,000+ total and 950 downloads in the last 30 days.
Pros & Cons
Free to download with optional Premium unlocks for advanced features
Uses microphone input to measure BPH for mechanical watches
Clear visuals with wave graphs and pulse histograms
Premium unlocks frequency display (30 minute trial) and open features by default in latest update
Not suitable for digital clocks
Less effective in noisy environments
May require external microphone for best results
About Clock Tuner
Clock Tuner was a tools app developed by BuzzSoft. It was removed from Google Play Apr 20, 2025 and is no longer available for download.
Download Statistics
Clock Tuner had been downloaded 200 thousand times before it became unavailable.
User Ratings
Clock Tuner was rated 2.91 out of 5 stars, based on 1.7 thousand ratings.
App Information
Clock Tuner was free to download. The APK download size was 950.35 kB. The last available version was 3.20. The last update was on May 15, 2024.
Technical Requirements
Clock Tuner required Android 4.4W+ or higher. The app had a content rating of Everyone. The app had been available on Google Play March 2013.
Description
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
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★★★★★
I use this for a grandmother clock I rebuilt. This app allows you to apply a custom Beat/hr 3960 (lower than other apps I tried). The sensitivity automatically and consistently compensates. I liked it so much I had no problem justifying paying for it.☺
★★★★★
I have used this to set the BPH on clocks. It is easy to use and has been a good aide to setting clocks up.
★★★★★
I've been using this for a couple of years now, on different Android versions. Works really well on my mechanical watches. Was able to get them to within a second a day. Haven't had many problems with outside noise, mostly use medium sensitivity. Not able to get it working with a pendulum wall clock, even though it's in a case. Would be great if there was a decent description of the graphs, scales and settings in the app. The FAQ here is helpful, but has big gaps. Great value for money, despite limitations.
★★☆☆☆
Shows double the beat rate as in 7200 instead of 3600. Also shows clock is slow, but it is actually fast. Not useful but could be.
★★☆☆☆
After some days with pro version, the app asks again to upgrade to the pro version. No way I will pay twice for the same app on the same device.
★★☆☆☆
Not accurate. I put a pencil mark on my cuckoo clock's pendulum and got to within 30 sec in 24 hours. Clock Tuner app showed 8241 bph. After my 1st two very small adjustments it became immediately apparent from the pencil mark that adjusting the pendulum to reach 7200 bph would be GROSSLY slow. Recently our mantel clock was professionally repaired, and the regulator set with a professional Telegrapher. It measured at 8992-9000 bph. Then the app stopped measuring; assume the free trial expired.
Technologies used by Clock Tuner
12 permissions·4 libraries
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Trust & Safety: Permissions align with standard app functionality for an ad-supported, feature-rich tool. It requests Internet, network state, storage, audio recording, and billing permissions, and relies on AdMob and Firebase for ads and analytics.
Frequently asked questions about Clock Tuner
Is Clock Tuner free?
Yes. Clock Tuner is free to download from Google Play.
Is Clock Tuner still available?
No. Clock Tuner was removed from Google Play. We last saw it there Apr 20, 2025.
Does Clock Tuner contain ads?
No. Google Play does not list Clock Tuner as containing ads.
What Android version does Clock Tuner require?
Clock Tuner runs on Android 4.4W and higher.
How large is the Clock Tuner APK?
The Clock Tuner APK is 950.35 kB.
Is Clock Tuner suitable for children?
Google Play rates the content of Clock Tuner as suitable for everyone.
How many times has Clock Tuner been downloaded?
Google Play lists 100,000+ downloads for Clock Tuner.
How do people rate Clock Tuner?
Clock Tuner scores 2.91 out of 5 stars, from 1,738 ratings on Google Play.
Who made Clock Tuner?
Clock Tuner was developed by BuzzSoft. It is listed in the tools category on Google Play.
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