ClockMaster vs Cuckoo Clock Calibration
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ClockMaster
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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>>> 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
Cuckoo Clock Calibration
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.
- 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
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The best and most accurate app for Cuckoo and Pendulum clocks calibration. Easily measure your Clock beats period and adjust it to a known correct value. Turn your iPhone into a precise train count sensor with an unbelievable 0.001 milliseconds (1μs) accuracy!! Get a quick and precise drift reading of how many seconds/minutes your clock is going to gain or loose per day. Every Cuckoo Clock owner knows that a mechanical clocks are not as accurate as modern day quartz clocks. This is because the clock mechanism is influenced by temperature, humidity, barometric pressure, breeze and others environmental conditions and therefore requires frequent adjustment. When you are regulating the pendulum of your Cuckoo Clock today, you are attempting to achieve the best timekeeping possible by a trail and error method by lifting the pendulum bob up or down and hope for a better accuracy. Using this app you can finally get a reading of your Clock ticks timing and precisely calibrate it to a known value. How to calibrate your Clock using this app: 1. Run this App and measure your Clock timings using the iPhone microphone 2. Use the Signal Gain and the Detection Threshold sliders to adjust the measured signal 3. Select a reference timing for calibration from the clock reference table or set your own reference timing 4. Read the accuracy level of your clock vs. the reference timing 5. Adjust your Clock pendulum bob to get the best accuracy! 6. Review how many seconds/minutes your Clock will gain or lose per day based on your current calibration The app will presents your Clock beats period reading as well as BPH (beats per hour) and BPM (beats per minutes) values. An accurate waveform display of the microphone signal will help you to adjust the tick readings for the best measurement. Animated Indicators will guide you through the calibration process. Manage the app Reference Timings table and add user defined clocks in addition to the predefined ones to support all your clocks. This app will turn your iPhone into a powerful measurement tool which normally costs hundreds of dollars.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | ClockMaster | Cuckoo Clock Calibration |
|---|---|---|
| Price | $49.99 | $0.99 — better |
| Rating | 3.8 (52 ratings) | 4.9 (36 ratings) — better |
| Positive reviews | 58.6% of reviews | 85.3% of reviews — better |
| Number of ratings | 52 — better | 36 |
| Update frequency | Every 5 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 18.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | ONYX Apps | Nir Hamzani |
Customer experience
ClockMaster
Cuckoo Clock Calibration
User reviews
ClockMaster
From 52 App Store ratingsWhat we love
- 👍 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
Room to improve
- 😞 Frustrating data handling
- 😞 Spreadsheet export issues
- 😞 iPhone notifications stop measurements
- 😞 Does not work for 400-day clocks
- 😞 External mic option missing
Cuckoo Clock Calibration
From 36 App Store ratingsWhat we love
- 👍 Easy to use
- 💰 Affordable price
- ✅ Accurate readings
- ⏱️ Saves time
- 🛠️ Helps with clock repair
Room to improve
- ❓ Confusing directions
- 📉 Inconsistent readings sometimes
- 🚫 External microphone issues
- 🎛️ Limited reference clocks
- 🗣️ Name not universal
Bugs and requests
ClockMaster
Reported bugs
6 issues- Data lost if app stops unexpectedly
- iPhone notifications interrupt measurements
- External mic option not available
- App freezes after iOS upgrade
- Screen touch points unresponsive
Show 1 moreShow fewer
- Help section incomplete
Requested features
13 requests- 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
Show 8 moreShow fewer
- Ability to set BPH to 480 for 400-day clocks
- Plots for drift rate and periodic error within the app
- Mic that works with the app
- External mic option
- More detailed graphs
- Option to upgrade for $5 instead of $20
- Better GUI and interface
- Indication of which half of the cycle is longer/shorter
Cuckoo Clock Calibration
Reported bugs
7 issues- 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
Show 2 moreShow fewer
- App crashes on iPhone 7+
- App crashes on iPhone 6s (v 12.4.1)
Requested features
20 requests- Accurate beat frequency display
- Level indicator display
- External microphone support
- Plot period over time
- Allow reference periods over 1 second
Show 15 moreShow fewer
- Save measurement data
- Allow frequency of 60.000 BPM
- Repackage/rename for all mechanical clocks
- Add Russian language
- Add parameters for specific Swiss and Soviet clocks
- Add lower beats per minute (e.g., 8 BPM)
- Add a distribution chart for beats
- Add seconds lost/gained per day display
- Broader clock options/community sharing of references
- More user-input references
- Better graph or display for out of beat
- Allow input reference beat rate directly by digits
- Add a feature to help get the clock in beat (e.g., which way to bend crutch)
- Invert display option
- Explanation of calculations for drift and instantaneous beat
In-app purchases
ClockMaster
- ClockMaster Pro$29.99
Cuckoo Clock Calibration
No in-app purchases
Questions
Is ClockMaster free?
Is Cuckoo Clock Calibration free?
Which has better reviews, ClockMaster or Cuckoo Clock Calibration?
Do ClockMaster or Cuckoo Clock Calibration have ads?
Which is updated more often, ClockMaster or Cuckoo Clock Calibration?
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