ClockMaster vs Timegrapher
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)
Read full descriptionHide full 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
Timegrapher
This application uses your device's microphone to measure the accuracy of mechanical watches. It detects ticking sounds to analyze beat rate, beat error, and amplitude, displaying results in real-time and over time.
- Detect BPH
- Measure Beat rate
- Measure Beat error
- Measure Amplitude
- Set Lift angle
- Real-time sound display
- Accuracy over time display
Read full descriptionHide full description
What is Timegrapher? Timegrapher measures the accuracy of your mechanical watch. The app uses your device's microphone to detect the ticking of your watch. Features: Detect BPH Measure Beat rate Measure Beat error Measure Amplitude Set Lift angle Display beat noises real time (unlock, impulse and lock sounds) Display accuracy and beat error over time More features will be coming soon.
Screenshots
Verdict
The clearest difference is price: Timegrapher at Free against ClockMaster's $49.99. Timegrapher also leads on iOS requirement (16.0 vs 18.0). ClockMaster's advantage is rating (3.8 vs 2.8). On review sentiment, ratings volume, update cadence and ads 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
Timegrapher is free to download; ClockMaster costs $49.99 up front. ClockMaster sells 1 one-off in-app purchase and Timegrapher sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
ClockMaster holds the better App Store score, 3.8 against 2.8. Both are backed by a comparable volume of ratings — 52 and 44 respectively. Written reviews point the same way: 59% of ClockMaster's written reviews are positive against 55% of Timegrapher's.
ClockMaster ships an update every 5 months, Timegrapher every 8 months. The most recent releases landed on September 23, 2026 and September 26, 2026 respectively.
| Parameter | ClockMaster | Timegrapher |
|---|---|---|
| Price | $49.99 | Free — better |
| Rating | 3.8 (52 ratings) — better | 2.8 (44 ratings) |
| Positive reviews | 58.6% of reviews — better | 55.0% of reviews |
| Number of ratings | 52 — better | 44 |
| Update frequency | Every 5 months — better | Every 8 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 18.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | ONYX Apps | Attila Lelko |
Customer experience
ClockMaster
Timegrapher
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
Timegrapher
From 44 App Store ratingsWhat we love
- 👍 Works great for some
- 🎯 Accurate for some users
- 💰 Good value for money (paid features)
- 💡 Useful for watch regulation
- 🎧 Works better with external mic
Room to improve
- 😞 Doesn't work for many
- 💸 Requires payment for full functionality
- ❓ Scam accusations
- 📱 Inconsistent readings
- 🚫 No readings at all
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
Timegrapher
Reported bugs
9 issues- Does not detect ticking
- Does not work at all
- Requires payment to function
- Inaccurate readings
- Unskippable pop-ups
Show 4 moreShow fewer
- App magnetizes watch
- Does not work after paying for premium
- Amplitude reported as 360
- Inconsistent measurements
Requested features
5 requests- Add dark mode
- Keep screen on during use
- Ability to save data per watch
- Improve visual design
- Lower price for Pro version
In-app purchases
ClockMaster
- ClockMaster Pro$29.99
Timegrapher
- Unlock full$5.99
Questions
Is ClockMaster free?
Is Timegrapher free?
Which has better reviews, ClockMaster or Timegrapher?
Do ClockMaster or Timegrapher have ads?
Which is updated more often, ClockMaster or Timegrapher?
Other comparisons















