ClockMaster - Time Regulator

ClockMaster - Time Regulator

Pendulum Clock Time Regulation

52 ratings
65 reviews
$49.99
In-App Purchases

Details

  • Released
  • Updated
  • January 18, 2011
  • March 19, 2026

Features

ClockMaster - Time Regulator screenshot #1 for iPhone
ClockMaster - Time Regulator screenshot #2 for iPhone
ClockMaster - Time Regulator screenshot #3 for iPhone
ClockMaster - Time Regulator screenshot #4 for iPhone
ClockMaster - Time Regulator screenshot #5 for iPhone
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About

This app analyzes the ticking sound of mechanical pendulum clocks to determine their running rate and error. It's designed for accurate long-term measurements, allowing users to regulate clocks efficiently. Advanced features include printable reports and data export for in-depth analysis.

Analyzes escapement ticking sound
Measures running rate in Beats Per Hour (B/H)
Reports error in Seconds Per Day (±S/D)
Supports long-term measurements
Generates printable PDF reports (Pro)
Exports raw data as .csv file (Pro)
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What's New in ClockMaster

3.0.31

March 19, 2026

- Additions to the beat rate database.

1

In-App Purchases

$29.99

ClockMaster Pro

Raw data export, Branded PDF Reports and more

User reviews

Best Tool In My Toolbox

I have a very old Seth Thomas 30 day gallery clock and I was able to easily set the beat and calibrate the time. Thanks for the great app.

Response from developer

Thanks! Glad you like it!

Good but very frustrating

The app performs beat measurement very well. That said, the app does have some very frustrating aspects, which, in my opinion, call into question the value of paying extra for the spreadsheet export.

At the top of my list of frustrations is the way data is handled. It appears to be streamed to memory rather than saved directly to a file. As a result, if the app stops unexpectedly, all recorded data from the current session is lost. This is utterly infuriating after one or two weeks of measurement, and it could be easily avoided by streaming data to a file rather than relying on a memory dump at the end. I cannot emphasise enough how frustrating this is. A far better approach would be to open a new file for each measurement and continuously write to it, with the option to append to the most recent file when starting a new session.

The spreadsheet exported has its own minor issues., the units are undocumented leaving you to guess (at least, I couldn't find them), and the export would be significantly more useful if each measurement row included the actual time.

A major issue is that any iPhone notification immediately stops measurements. Putting the phone into airplane mode helps, but it’s nearly impossible to prevent an iPhone from displaying a notification at some point. Ideally, the app should be able to continue running in the background, but I suspect that may not be possible on iOS. A workaround would be an option to manually restart a measurement and append it to an existing dataset.

In conclusion, the base price of the app is well worth it, but the additional spreadsheet export and long-term measurement functionality come with significant frustrations. These could easily be resolved by continuously streaming data to a file rather than relying on volatile memory storage (assuming that’s how it’s done).
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Very good

I came upon this app after years of using a free, but very limited beat tracker. This app is exactly what I wanted, nicely designed, good resources, seems to work very well. Even using the built-in mic on an iPhone, or the microphone on Apple EarPods, it can track a movement very well, even with other distracting noises as there is a selectable filter. Yes it has a cost but I believe it is fair, at least so far and sometimes you have to pay for the best there is. It is certainly a good alternative to buying a much more expensive dedicated instrument.
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Response from developer

Glad you like it! Thanks!

Waste of Money

Simply doesn’t work. The free app for cuckoo clocks works better!!!!

Clockmaster regulator analyzer

The manual clearly shows a setting for external mic operation yet my version only gives me the option of internal iPhone mics. Have sent 3 messages to support for help, and they ignore me. Can only assume the app is flawed.
Don Brown/ frustrated customer

Response from developer

Hello, we haven't received any messages from you, please contact us at apps@onyx3.com The app works with external microphones and sensors, it requires an adapter as described in the documentation. This is explained in the documentation and clearly shown in the videos here: https://clockmasterapp.com/

Developer apps

FAQ

What does ClockMaster do?

ClockMaster analyzes the ticking sound of mechanical pendulum clocks to determine their running rate and error. It measures the clock's speed in Beats Per Hour (B/H) and reports the deviation in Seconds Per Day (±S/D), allowing for precise regulation.

What are the key features of ClockMaster?

The app analyzes escapement sounds to measure clock rate and error. It supports accurate long-term measurements, which is crucial for mechanical clocks that fluctuate. The Pro version offers additional features like saving and sharing branded PDF reports and exporting raw data as a .csv file for spreadsheet analysis.

How much does ClockMaster cost?

The base version of ClockMaster is free. Additional advanced features, such as generating printable PDF reports and exporting raw data, are available through an in-app upgrade to ClockMaster Pro.

What devices is ClockMaster compatible with?

ClockMaster is a mobile application designed for smartphones and tablets. Specific compatibility details regarding operating system versions (e.g., iOS or Android) are typically found in the app store listing.

Who would benefit from using ClockMaster?

This app is ideal for professional clockmakers and repairers (horologists) who need to accurately regulate mechanical pendulum clocks. It is also useful for serious amateur enthusiasts who want to understand and maintain the precision of their antique or mechanical timepieces.