Comparison

ClockMaster vs Timegrapher

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read 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

About

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.

Highlights
  • Detect BPH
  • Measure Beat rate
  • Measure Beat error
  • Measure Amplitude
  • Set Lift angle
  • Real-time sound display
  • Accuracy over time display
Features
Read 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

ClockMaster4 screens
Timegrapher3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
ClockMaster versus Timegrapher: the parameters behind the verdict, then further details
ParameterClockMasterTimegrapher
Price$49.99Free — better
Rating3.8 (52 ratings) — better2.8 (44 ratings)
Positive reviews58.6% of reviews — better55.0% of reviews
Number of ratings52 — better44
Update frequencyEvery 5 months — betterEvery 8 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS18.016.0 — better
Further details — not scored
Size5 MB9 MB
Age rating4+4+
DeveloperONYX AppsAttila Lelko

Customer experience

ClockMaster

All ratings52 ratings
Positive71.2%
Neutral5.8%
Negative23.1%
Written reviews70 reviews
Positive58.6%
Neutral5.7%
Negative35.7%

Timegrapher

All ratings44 ratings
Positive40.9%
Neutral6.8%
Negative52.3%
Written reviews60 reviews
Positive55.0%
Neutral3.3%
Negative41.7%

User reviews

ClockMaster

From 52 App Store ratings

What 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 ratings

What 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 more
  • 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 more
  • 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 more
  • 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

1 purchases

ClockMaster

One-time1
  • ClockMaster Pro$29.99
1 purchases

Timegrapher

One-time1
  • Unlock full$5.99

Questions

Is ClockMaster free?
ClockMaster costs $49.99, and also offers in-app purchases.
Is Timegrapher free?
Timegrapher is free to download, with in-app purchases available.
Which has better reviews, ClockMaster or Timegrapher?
ClockMaster is rated higher. ClockMaster averages 3.8 out of 5 from 52 ratings, while Timegrapher averages 2.8 from 44 ratings.
Do ClockMaster or Timegrapher have ads?
Neither ClockMaster nor Timegrapher shows ads.
Which is updated more often, ClockMaster or Timegrapher?
ClockMaster ships an update every 5 months, and Timegrapher every 8 months. Most recently, ClockMaster was updated on September 23, 2026 and Timegrapher on September 26, 2026.

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