# ClockMaster vs Barometer & Altimeter & Thermo

The clearest difference is price: Barometer & Altimeter & Thermo at Free against ClockMaster's $49.99. Barometer & Altimeter & Thermo also leads on rating (4.8 vs 3.8) and ratings volume (9.6K vs 52). On ads, in-app purchases and monetization model there is nothing between them.

Barometer & Altimeter & Thermo is free to download; ClockMaster costs $49.99 up front. ClockMaster sells 1 one-off in-app purchase and Barometer & Altimeter & Thermo sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Barometer & Altimeter & Thermo holds the better App Store score, 4.8 against 3.8. That said, the two scores are not equally well evidenced: Barometer & Altimeter & Thermo has 9.6K ratings behind it against 52, so its average is the more settled of the two. Written reviews point the same way: 59% of ClockMaster's written reviews are positive against 72% of Barometer & Altimeter & Thermo's.

ClockMaster ships an update every 5 months, Barometer & Altimeter & Thermo every 2 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | ClockMaster | Barometer & Altimeter & Thermo |
| --- | --- | --- |
| Price | $49.99 | **Free** |
| Rating | [3.8 (52 ratings)](https://appshunter.io/ios/app/clockmaster-time-regulator/id413901882/reviews) | **[4.8 (9.6K ratings)](https://appshunter.io/ios/app/barometer-and-altimeter-and-thermo/id1267360992/reviews)** |
| Number of ratings | 52 | **9.6K** |
| Positive reviews | 58.6% of reviews | **71.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 5 MB | 17 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ONYX Apps](https://appshunter.io/developer/356553882) | [ExaMobile S.A.](https://appshunter.io/developer/506014841) |

## 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


### Barometer & Altimeter & Thermo

[App page](https://appshunter.io/ios/app/barometer-and-altimeter-and-thermo/id1267360992)

Measure atmospheric pressure, altitude, and current weather conditions using your device's sensors and GPS. Get real-time data on temperature, wind speed, and humidity, with automatic calibration for accuracy. Useful for health, outdoor activities, and weather prediction.

**Highlights:** Accurate height measurement, Barometric pressure measurement, GPS coordinates and location data, Current weather information, Outside temperature, Wind speed and humidity

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $1.99 | one-time |

**What reviewers like**

- 😊 Simple and intuitive
- 🔍 Accurate barometric readings
- 🔢 Altimeter functionality
- 🔧 Customizable settings
- 💰 Reasonable price for ad-free version

**What reviewers complain about**

- 🐛 Inconsistent altimeter accuracy
- 🔍 Questionable pressure/altitude readings
- 📈 Lack of historical data/trend analysis
- 🔍 Inaccurate weather data
- 🔍 Unreliable performance after updates

**Reported bugs**

- Barometer not working without internet connection
- Pressure readings not updating correctly
- Ads not removed after purchase of ad-free version
- Compatibility issues with latest iOS versions

**Requested features**

- Add pressure trend/history graph
- Implement weather symbols on the dial
- Allow manual altitude calibration
- Provide wind speed data
- Develop an Apple Watch companion app


## Frequently asked questions

### Is ClockMaster free?

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

### Is Barometer & Altimeter & Thermo free?

Barometer & Altimeter & Thermo is free to download, with in-app purchases available.

### Which has better reviews, ClockMaster or Barometer & Altimeter & Thermo?

Barometer & Altimeter & Thermo is rated higher. ClockMaster averages 3.8 out of 5 from 52 ratings, while Barometer & Altimeter & Thermo averages 4.8 from 9.6K ratings.

### Do ClockMaster or Barometer & Altimeter & Thermo have ads?

Neither ClockMaster nor Barometer & Altimeter & Thermo shows ads.

### Which is updated more often, ClockMaster or Barometer & Altimeter & Thermo?

ClockMaster ships an update every 5 months, and Barometer & Altimeter & Thermo every 2 months. Most recently, ClockMaster was updated on October 29, 2026 and Barometer & Altimeter & Thermo on October 30, 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.*