# ClockMaster vs Cuckoo Clock Calibration

The clearest difference is price: Cuckoo Clock Calibration at $0.99 against ClockMaster's $49.99. Cuckoo Clock Calibration also leads on rating (4.9 vs 3.8) and in-app purchases (none vs 1). On ratings volume, ads and device support there is nothing between them.

ClockMaster costs $49.99 and Cuckoo Clock Calibration $0.99 up front. ClockMaster sells 1 one-off in-app purchase. Cuckoo Clock Calibration asks for nothing beyond the download.

Cuckoo Clock Calibration holds the better App Store score, 4.9 against 3.8. Both are backed by a comparable volume of ratings — 52 and 36 respectively. Written reviews point the same way: 59% of ClockMaster's written reviews are positive against 85% of Cuckoo Clock Calibration's.

ClockMaster ships an update every 5 months, Cuckoo Clock Calibration monthly. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | ClockMaster | Cuckoo Clock Calibration |
| --- | --- | --- |
| Price | $49.99 | **$0.99** |
| Rating | [3.8 (52 ratings)](https://appshunter.io/ios/app/clockmaster-time-regulator/id413901882/reviews) | **[4.9 (36 ratings)](https://appshunter.io/ios/app/cuckoo-clock-calibration/id1171487289/reviews)** |
| Number of ratings | **52** | 36 |
| Positive reviews | 58.6% of reviews | **85.3% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 19 MB |
| Requires iOS | 18.0 | **9.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ONYX Apps](https://appshunter.io/developer/356553882) | [Nir Hamzani](https://appshunter.io/developer/1026666321) |

## What reviewers say

### ClockMaster

[App page](https://appshunter.io/ios/app/clockmaster-time-regulator/id413901882)

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.

**Highlights:** 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)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ClockMaster Pro | $29.99 | one-time |

**What reviewers like**

- 👍 Works very well
- 👍 Accurately sets beat and calibrates time
- 👍 Good alternative to expensive dedicated instruments
- 👍 Elegant display for setting beat and symmetry
- 👍 Works well for professional clock repairers

**What reviewers complain about**

- 😞 Frustrating data handling
- 😞 Spreadsheet export issues
- 😞 iPhone notifications stop measurements
- 😞 Does not work for 400-day clocks
- 😞 External mic option missing

**Reported bugs**

- Data lost if app stops unexpectedly
- iPhone notifications interrupt measurements
- External mic option not available
- App freezes after iOS upgrade
- Screen touch points unresponsive

**Requested features**

- Printable protocol like a timegrapher
- Beat delta info on regulation screen
- Option to manually restart measurement and append
- Undocumented units in spreadsheet export
- Include actual time in spreadsheet export


### Cuckoo Clock Calibration

[App page](https://appshunter.io/ios/app/cuckoo-clock-calibration/id1171487289)

This app transforms your iPhone into a highly accurate sensor for calibrating cuckoo and pendulum clocks. It measures clock beats, calculates daily gain or loss, and guides you through precise adjustments for optimal timekeeping.

**Highlights:** Precise clock beat period measurement, Daily gain/loss calculation, Train count sensor with 1μs accuracy, Adjustable signal gain and detection threshold, Reference timing table with user-defined clocks, Waveform display for tick readings

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 💰 Affordable price
- ✅ Accurate readings
- ⏱️ Saves time
- 🛠️ Helps with clock repair

**What reviewers complain about**

- ❓ Confusing directions
- 📉 Inconsistent readings sometimes
- 🚫 External microphone issues
- 🎛️ Limited reference clocks
- 🗣️ Name not universal

**Reported bugs**

- App closes after setting reference
- App crashes on startup after reference beat memory use
- App crashes
- App crashes and requires reinstallation
- App crashes on iPhone 6s

**Requested features**

- Accurate beat frequency display
- Level indicator display
- External microphone support
- Plot period over time
- Allow reference periods over 1 second


## Frequently asked questions

### Is ClockMaster free?

ClockMaster costs $49.99, and also offers in-app purchases.

### Is Cuckoo Clock Calibration free?

Cuckoo Clock Calibration costs $0.99, with no in-app purchases.

### Which has better reviews, ClockMaster or Cuckoo Clock Calibration?

Cuckoo Clock Calibration is rated higher. ClockMaster averages 3.8 out of 5 from 52 ratings, while Cuckoo Clock Calibration averages 4.9 from 36 ratings.

### Do ClockMaster or Cuckoo Clock Calibration have ads?

Neither ClockMaster nor Cuckoo Clock Calibration shows ads.

### Which is updated more often, ClockMaster or Cuckoo Clock Calibration?

ClockMaster ships an update every 5 months, and Cuckoo Clock Calibration monthly. Most recently, ClockMaster was updated on October 12, 2026 and Cuckoo Clock Calibration on October 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*