---
title: "ClockMaster - Time Regulator - Reviews, Revenue and Downloads in United States | Apple App Store"
description: ">>> Check out the demo videos at ClockMasterApp.com  ClockMaster is a clock timing software, in many ways similar to watch timegraphers, but specifically designed to work with mechanical pendulum cloc"
---

# ClockMaster - Time Regulator — United States
> Pendulum Clock Time Regulation

![ClockMaster App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/36/9b/1a/369b1ad6-7256-5255-21a8-969a6bcb089b/AppIcon-0-0-1x_U007emarketing-0-3-85-220.png/400x400bb.png)

**Developer:** [ONYX Apps](https://apptail.io/developer/onyx-apps-EoJ)
**Category:** Utilities
**Rating:** 3.9/5 (52 ratings)
**Price:** $49.99
**Bundle ID:** com.onyx3.clockmaster
**Store:** Apple App Store
**Country:** United States
**Version:** 3.0.31 (released 2026-03-19)
**Original Release:** 2011-01-18

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id413901882)
**AppTail Page:** [https://apptail.io/app/clockmaster-time-regulator-hfHd/united-states](https://apptail.io/app/clockmaster-time-regulator-hfHd/united-states)

## ClockMaster Description
>>> Check out the demo videos at ClockMasterApp.com

ClockMaster is a clock timing software, in many ways similar to watch timegraphers, but specifically designed to work with mechanical pendulum clocks. The app analyzes the ticking sound of the escapement to determine the clock's running rate measured in Beats Per Hour (B/H). This rate is then compared to a specified Target Rate, and the Error is reported as Seconds Per Day fast or slow (±S/D).

The speed of a mechanical pendulum clock is not constant, fluctuating with age and wear, spring tension and even temperature. The ClockMaster app was created with a focus on accurate long-term measurements where traditional timers often do not function very well.

For the professional horologist or interested amateur, you can now test in the field — put the clock in exact beat and regulate the clock with just a few hours of testing. For increased rate accuracy and in depth investigation of clock movement's behavior, you can conduct long-term measurements for up to two weeks (ClockMaster Pro). Branded, printable PDF reports can be generated for each measurement, and the raw data exported as .csv file for graphing in a spreadsheet (ClockMaster Pro). 

ClockMaster Pro (in-app upgrade) provides these additional features:

• Save and share branded, printable PDF reports for each measurement
• Export raw measurement data as a .csv file for spreadsheet analysis
• Conduct long-term measurements of up to two weeks

## ClockMaster Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple112/v4/5a/c6/bf/5ac6bf29-8d19-0f2c-13b9-23cec9df6203/pr_source.png/1242x2688.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple122/v4/bc/66/c5/bc66c5ee-e516-8da6-edb7-6aa3edcc25a8/pr_source.png/1242x2688.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/Purple112/v4/2d/74/ca/2d74caef-5e16-0603-3bd1-645bc7e4bcae/pr_source.png/1242x2688.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource112/v4/ec/8f/6f/ec8f6f35-a293-f7ce-e8a9-8666cdf18ac0/66437897-a802-422b-95d9-6d6eef8ca2cc_Simulator_Screen_Shot_-_iPhone_14_Plus_-_2022-11-06_at_16.43.20.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource112/v4/85/04/9b/85049b12-b6fa-077a-c1b5-bb59197d3bf0/e97b4d02-22c7-403c-8c18-42cd98dcf0a4_Simulator_Screen_Shot_-_iPhone_14_Plus_-_2022-11-06_at_16.43.36.png/1284x2778.png)

## ClockMaster Rating Breakdown in United States
- 5 stars: 30 (58%)
- 4 stars: 7 (13%)
- 3 stars: 3 (6%)
- 2 stars: 1 (2%)
- 1 stars: 11 (21%)

## ClockMaster Reviews in United States

### ***** "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.
-- snooded, 2025-02-21

### *---- "Waste of Money"
Simply doesn’t work. The free app for cuckoo clocks works better!!!!
-- Cwick$, 2024-04-25

### *---- "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
-- Wiscgrad, 2024-04-20

### ***** "Great app for the Clock aficionado…"
One of my hobbies is to clean and repair old grandfather clocks. This app helps in a very simple but elegant display to set the bit, the pendulum symmetry, and other more advanced features. I highly recommended it.
-- A. G. South Carolina., 2023-08-11

### *---- "Will not work for 400-day clocks"
I really don’t understand why they’ve set a bottom threshold on how many beats per hour you can measure. My clocks I work on operate at 8 beats per minute. I can get it to measure correctly due to this threshold. It would be useful if I could set the BPH to 480.
-- Gallifreyan42, 2023-05-05

### ***** "Unbelievably helpful"
I was getting my butt kicked by a wooden mechanical clock I made. I was using metronome apps, stopwatches, etc. to try and get the beat and regulation right. I'm talking weeks of time spent. Wasted. I finally found this app and it does everything it says, and does it very well. The only complaint I have, if you can call it that, is that I wish they had the beat delta info on the regulation screen. I was considering upgrading to the pro version but it's another $19.99 and it doesn't really tell you everything that is included with that upgrade.
-- Bfluri, 2022-11-07

### ***** "Piezoelectric pickup"
I’ve found that the Peterson Pitch-grabber works very well with my iPad and iPhone. 
There is an adapter available on Amazon that allows you to plug in your Lightning charger and your Lightning dongle provided with your iPhone that you then plug the Pitch-grabber into. This is the only adapter that will allow you to run ClockMaster and charge at the same time. Using my iPad Mini 4 with full brightness and full screen it actually will also recharge it at the same time!
Great app!!!
-- Pat Mihlfeld, 2019-11-19

### ***** "Wonderful!"
My ship’s bell clock had been running almost a minute-a-day off for years.  With a few iterations of this app it’s now within a second a day!
-- Island Enigma, 2019-08-03

### ***** "Excellent app"
I’m a clock’s collector so I always do servicing and repairing pendulum clocks.

Since I have got the app (one year ago), I found the app indeed very helpful for me to make pendulum clocks beat and work accurately.

It will take short time to adjust accuracy of clock if you know BM/BH of it otherwise you note current BM/BH then wait for the clock working for 24 hs and base on accuracy of clock you calculate actual BM/BH then adjust clock work with the new BM/BH.

Before when I didn’t have the app, it took me almost one week to make clocks work perfectly.

Please share me if any other app is better this app.
-- Cauduong2001, 2019-07-19

### *---- "Very useful app"
Update: the latest rewrite has made this app useless. If I could, I would restore the old version. It used to work quit well. Now useless.
-- DBertinot, 2019-07-18

[View all ClockMaster reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)

## ClockMaster In-App Purchases
| Item | Price |
|------|-------|
| ClockMaster Pro | $29.99 |


## ClockMaster Discovered Keywords
- clockmaster

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## ClockMaster Available In
- [United States](https://apptail.io/app/clockmaster-time-regulator-hfHd/united-states)
- [United Kingdom](https://apptail.io/app/clockmaster-time-regulator-hfHd/united-kingdom)
- [Norway](https://apptail.io/app/clockmaster-time-regulator-hfHd/norway)
- [Germany](https://apptail.io/app/clockmaster-time-regulator-hfHd/germany)
- [Australia](https://apptail.io/app/clockmaster-time-regulator-hfHd/australia)
- [Canada](https://apptail.io/app/clockmaster-time-regulator-hfHd/canada)
- [Japan](https://apptail.io/app/clockmaster-time-regulator-hfHd/japan)
- [Ireland](https://apptail.io/app/clockmaster-time-regulator-hfHd/ireland)
- [Portugal](https://apptail.io/app/clockmaster-time-regulator-hfHd/portugal)
- [Netherlands](https://apptail.io/app/clockmaster-time-regulator-hfHd/netherlands)
- [Vietnam](https://apptail.io/app/clockmaster-time-regulator-hfHd/vietnam)
- [Türkiye](https://apptail.io/app/clockmaster-time-regulator-hfHd/turkey)
- [Bulgaria](https://apptail.io/app/clockmaster-time-regulator-hfHd/bulgaria)
- [South Africa](https://apptail.io/app/clockmaster-time-regulator-hfHd/south-africa)
- [India](https://apptail.io/app/clockmaster-time-regulator-hfHd/india)
- [Italy](https://apptail.io/app/clockmaster-time-regulator-hfHd/italy)
- [Spain](https://apptail.io/app/clockmaster-time-regulator-hfHd/spain)
- [Finland](https://apptail.io/app/clockmaster-time-regulator-hfHd/finland)
- [France](https://apptail.io/app/clockmaster-time-regulator-hfHd/france)
- [Sweden](https://apptail.io/app/clockmaster-time-regulator-hfHd/sweden)
- [Singapore](https://apptail.io/app/clockmaster-time-regulator-hfHd/singapore)
- [Switzerland](https://apptail.io/app/clockmaster-time-regulator-hfHd/switzerland)
- [Argentina](https://apptail.io/app/clockmaster-time-regulator-hfHd/argentina)
- [China](https://apptail.io/app/clockmaster-time-regulator-hfHd/china)
- [Iceland](https://apptail.io/app/clockmaster-time-regulator-hfHd/iceland)
- [Kenya](https://apptail.io/app/clockmaster-time-regulator-hfHd/kenya)
- [South Korea](https://apptail.io/app/clockmaster-time-regulator-hfHd/south-korea)
- [Kuwait](https://apptail.io/app/clockmaster-time-regulator-hfHd/kuwait)
- [Kazakhstan](https://apptail.io/app/clockmaster-time-regulator-hfHd/kazakhstan)
- [Lebanon](https://apptail.io/app/clockmaster-time-regulator-hfHd/lebanon)
- [Lithuania](https://apptail.io/app/clockmaster-time-regulator-hfHd/lithuania)
- [Luxembourg](https://apptail.io/app/clockmaster-time-regulator-hfHd/luxembourg)
- [Latvia](https://apptail.io/app/clockmaster-time-regulator-hfHd/latvia)
- [Mexico](https://apptail.io/app/clockmaster-time-regulator-hfHd/mexico)
- [Malaysia](https://apptail.io/app/clockmaster-time-regulator-hfHd/malaysia)
- [Nigeria](https://apptail.io/app/clockmaster-time-regulator-hfHd/nigeria)
- [Nepal](https://apptail.io/app/clockmaster-time-regulator-hfHd/nepal)
- [New Zealand](https://apptail.io/app/clockmaster-time-regulator-hfHd/new-zealand)
- [Peru](https://apptail.io/app/clockmaster-time-regulator-hfHd/peru)
- [Philippines](https://apptail.io/app/clockmaster-time-regulator-hfHd/philippines)
- [Pakistan](https://apptail.io/app/clockmaster-time-regulator-hfHd/pakistan)
- [Poland](https://apptail.io/app/clockmaster-time-regulator-hfHd/poland)
- [Romania](https://apptail.io/app/clockmaster-time-regulator-hfHd/romania)
- [Russia](https://apptail.io/app/clockmaster-time-regulator-hfHd/russia)
- [Saudi Arabia](https://apptail.io/app/clockmaster-time-regulator-hfHd/saudi-arabia)
- [United Arab Emirates](https://apptail.io/app/clockmaster-time-regulator-hfHd/united-arab-emirates)
- [Thailand](https://apptail.io/app/clockmaster-time-regulator-hfHd/thailand)
- [Tunisia](https://apptail.io/app/clockmaster-time-regulator-hfHd/tunisia)
- [Taiwan](https://apptail.io/app/clockmaster-time-regulator-hfHd/taiwan)
- [Ukraine](https://apptail.io/app/clockmaster-time-regulator-hfHd/ukraine)
- [Uzbekistan](https://apptail.io/app/clockmaster-time-regulator-hfHd/uzbekistan)
- [Slovakia](https://apptail.io/app/clockmaster-time-regulator-hfHd/slovakia)
- [Armenia](https://apptail.io/app/clockmaster-time-regulator-hfHd/armenia)
- [Austria](https://apptail.io/app/clockmaster-time-regulator-hfHd/austria)
- [Azerbaijan](https://apptail.io/app/clockmaster-time-regulator-hfHd/azerbaijan)
- [Belgium](https://apptail.io/app/clockmaster-time-regulator-hfHd/belgium)
- [Brunei](https://apptail.io/app/clockmaster-time-regulator-hfHd/brunei)
- [Brazil](https://apptail.io/app/clockmaster-time-regulator-hfHd/brazil)
- [Belarus](https://apptail.io/app/clockmaster-time-regulator-hfHd/belarus)
- [Chile](https://apptail.io/app/clockmaster-time-regulator-hfHd/chile)
- [Colombia](https://apptail.io/app/clockmaster-time-regulator-hfHd/colombia)
- [Cyprus](https://apptail.io/app/clockmaster-time-regulator-hfHd/cyprus)
- [Czechia](https://apptail.io/app/clockmaster-time-regulator-hfHd/czechia)
- [Denmark](https://apptail.io/app/clockmaster-time-regulator-hfHd/denmark)
- [Dominican Republic](https://apptail.io/app/clockmaster-time-regulator-hfHd/dominican-republic)
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---

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