ClockMaster - Time Regulator

Name: ClockMaster - Time Regulator
Price: 49.99 USD
Rating: 3.8 (52 reviews)
Author: ONYX Apps

By: ONYX Apps

Pendulum Clock Time Regulation

Features & Capabilities

ClockMaster is a specialized clock timing tool designed for mechanical pendulum clocks. It analyzes the tick of the escapement to calculate Beats Per Hour, compares it to a target rate, and reports drift in seconds per day.

The Pro upgrade unlocks long-term measurements (up to two weeks), branded PDF reports, and CSV export for graphing, enabling field testing, precise regulation, and deeper analysis of clock movement.

User Growth & Download Statistics

App Education Developer Tools

By:

ONYX Apps

Rating:

3.80

(52)

Version:

3.0.31 Last updated: 2026-03-19

Version code:

883549478

Creation date:

2011-01-18

Compatible devices:

Size:

4.86MB

Price:

49.99

URLs:

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-06

Compare stats and ranking:

Ranking

# 206,985 ▼ 452

For Developers

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Contact the developer

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Developed by:

ONYX Apps

Apple Apps Store

https://apps.apple.com/us/app/clockmaster-time-regulator/id413901882

User Reviews

ClockMaster is praised for accurate beat calibration and pendulum regulation across many clock types, with a simple interface and good hardware compatibility. However, recurring concerns include high/opaque upgrade costs, mic/hardware reliability issues, occasional stability problems after updates, and requests for more in-app data visualizations.

Pros

Very effective at calibrating beat and regulating pendulums; users report significant accuracy improvements across cuckoo, mantel, and grandfather clocks.
Simple, elegant display and intuitive controls that appeal to hobbyists and horologists.
Flexible mic/hardware support: works with internal mic and with external pickups/accessories to improve accuracy.
Brings clocks within significant accuracy, often reducing long-term drift across various clock types.
Broad clock compatibility and usefulness across different clock types, from small mantel clocks to antique grandfather clocks.

Cons

Upgrade pricing is high and often unclear what Pro includes.
Microphone/hardware reliability varies; results depend on mic quality and setup (internal vs external).
Reliability issues after updates (app or iOS) including freezes or broken functionality.
Requests for more in-app data/visuals (e.g., drift plots, half-cycle indicators); current visuals are limited.

Recent reviews

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.

by sn*****, 2025-02-21

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

by Cw*****, 2024-04-25

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