Comparison

ClockMaster vs Airthings

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

Airthings

Monitor and improve your indoor air quality with smart devices. Get real-time insights, track trends, and receive actionable advice to enhance focus, reduce allergies, and sleep better. Control your air purifier and stay informed about pollen forecasts.

Highlights
  • Quick device setup
  • At-a-glance air quality indicators
  • Detailed trend tracking
  • Air purifier remote control
  • 5-day pollen forecast
  • Air quality notifications
  • Personalized air reports
Features
Read full description

Breathe better with Airthings! Smart air quality monitors & purifiers you can trust. Shift your state of being with Airthings. Our products can help you improve indoor air quality leading to better focus, calming of allergies, and enhancement of sleep while ensuring an overall more healthy home. It features: • Quick and easy device setup • AirGlimpse™: Color-coded indicators give you at-a-glance information about your air quality • Access to the detailed graphs to help you track and find trends over time • Set focuses for your devices - air quality data broken down into high engagement problems that you care about • Control your Renew air purifier from anywhere • 5-day pollen forecast for your location with actionable advice • Notifications inform you of poor air quality and suggest ways to improve it, fast • Tips for addressing common indoor air quality problems and how to make the most of your device • Recommendations on the best Airthings monitor for your needs • Subscribe to Air Reports - We’ll send you a monthly update which summarises all the sensor data for your location. This app supports all Airthings products. If you have questions about using the app or any of our monitors, please refer to the Airthings Help Center or contact support@airthings.com.

Screenshots

ClockMaster4 screens
Airthings4 screens

Verdict

The call

The clearest difference is price: Airthings at Free against ClockMaster's $49.99. Airthings also leads on rating (4.4 vs 3.8) and in-app purchases (none vs 1). ClockMaster's advantage is review sentiment (59% vs 33%). On ads, monetization model, device support and iOS requirement 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

Airthings is free to download; ClockMaster costs $49.99 up front. ClockMaster sells 1 one-off in-app purchase. Airthings asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Airthings holds the better App Store score, 4.4 against 3.8. That said, the two scores are not equally well evidenced: Airthings has 3K ratings behind it against 52, so its average is the more settled of the two. Written reviews complicate that: 59% of ClockMaster's written reviews are positive against 33% of Airthings's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

ClockMaster ships an update every 5 months, Airthings fortnightly. Both last shipped on October 12, 2026.

Scorecard6 real differences · 4 level
ClockMaster versus Airthings: the parameters behind the verdict, then further details
ParameterClockMasterAirthings
Price$49.99Free — better
Rating3.8 (52 ratings)4.4 (3K ratings) — better
Positive reviews58.6% of reviews — better32.9% of reviews
Number of ratings523K — better
Update frequencyEvery 5 monthsFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS18.017.6 — better
Further details — not scored
Size5 MB103 MB
Age rating4+4+
DeveloperONYX AppsAirthings ASA

Customer experience

ClockMaster

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

Airthings

All ratings3,015 ratings
Positive83.7%
Neutral3.4%
Negative12.9%
Written reviews459 reviews
Positive32.9%
Neutral9.2%
Negative58.0%

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

Airthings

From 3K App Store ratings

What we love

  • 🚀 Simple to understand and setup
  • 🚀 Intuitive and easy to use app
  • 🚀 Efficient and fast
  • 🚀 Provides great information on air quality
  • 🚀 Accurate and reliable sensor readings

Room to improve

  • 🐛 App has connectivity issues, often fails to sync
  • 🐛 App is buggy and has many errors
  • 🐛 Inaccurate or inconsistent sensor readings
  • 🐛 Difficult to set up and connect devices
  • 🐛 Lack of customization options for thresholds and notifications

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

Airthings

Reported bugs

6 issues
  • App crashes frequently
  • Unable to add new devices or accounts
  • Incorrect color coding and data display
  • Delayed or missing sensor data updates
  • Bluetooth connectivity issues
Show 1 more
  • Unexplained battery drain on devices

Requested features

6 requests
  • Add HomeKit integration
  • Allow custom thresholds and notifications
  • Improve data visualization and historical trending
  • Add more detailed information on air quality issues and remedies
  • Provide an iPad-optimized version of the app
Show 1 more
  • Improve syncing and connectivity reliability

In-app purchases

1 purchases

ClockMaster

One-time1
  • ClockMaster Pro$29.99
None

Airthings

No in-app purchases

Questions

Is ClockMaster free?
ClockMaster costs $49.99, and also offers in-app purchases.
Is Airthings free?
Airthings is free to download, with no in-app purchases.
Which has better reviews, ClockMaster or Airthings?
Airthings is rated higher. ClockMaster averages 3.8 out of 5 from 52 ratings, while Airthings averages 4.4 from 3K ratings.
Do ClockMaster or Airthings have ads?
Neither ClockMaster nor Airthings shows ads.
Which is updated more often, ClockMaster or Airthings?
ClockMaster ships an update every 5 months, and Airthings fortnightly. Most recently, ClockMaster was updated on October 12, 2026 and Airthings on October 12, 2026.

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