# Timegrapher vs Magnetometer ∞

The clearest difference is rating: Magnetometer ∞ at 4.4 against Timegrapher's 2.8. Magnetometer ∞ also leads on update cadence (every 2 weeks vs every 8 months). Timegrapher's advantage is ads (none vs shown). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. Timegrapher sells 1 one-off in-app purchase and Magnetometer ∞ sells 2 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Magnetometer ∞ holds the better App Store score, 4.4 against 2.8. Both are backed by a comparable volume of ratings — 46 and 59 respectively.

Timegrapher ships an update every 8 months, Magnetometer ∞ every 2 weeks. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Timegrapher | Magnetometer ∞ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (46 ratings)](https://appshunter.io/ios/app/timegrapher-watch-accuracy/id6450460771/reviews) | **[4.4 (59 ratings)](https://appshunter.io/ios/app/magnetometer/id6753061844/reviews)** |
| Number of ratings | 46 | **59** |
| Positive reviews | 55.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 9 MB | 16 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Attila Lelko](https://appshunter.io/developer/1693385247) | [Fawkes Wei](https://appshunter.io/developer/432767536) |

## What reviewers say

### Timegrapher

[App page](https://appshunter.io/ios/app/timegrapher-watch-accuracy/id6450460771)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock full | $5.99 | one-time |

**What reviewers like**

- 👍 Works great for some
- 🎯 Accurate for some users
- 💰 Good value for money (paid features)
- 💡 Useful for watch regulation
- 🎧 Works better with external mic

**What reviewers complain about**

- 😞 Doesn't work for many
- 💸 Requires payment for full functionality
- ❓ Scam accusations
- 📱 Inconsistent readings
- 🚫 No readings at all

**Reported bugs**

- Does not detect ticking
- Does not work at all
- Requires payment to function
- Inaccurate readings
- Unskippable pop-ups

**Requested features**

- Add dark mode
- Keep screen on during use
- Ability to save data per watch
- Improve visual design
- Lower price for Pro version


### Magnetometer ∞

[App page](https://appshunter.io/ios/app/magnetometer/id6753061844)

Visualize magnetic fields in real-time with precision charts and monitor X, Y, Z axis readings. Ideal for scientific research, education, and field work, this app offers professional-grade accuracy and an intuitive interface for easy data interpretation.

**Highlights:** Real-time magnetic field visualization, X, Y, Z axis readings in microteslas, Scientific research tool, Educational aid, Field work companion, Intuitive interface

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is Timegrapher free?

Timegrapher is free to download, with in-app purchases available.

### Is Magnetometer ∞ free?

Magnetometer ∞ is free to download, with in-app purchases available.

### Which has better reviews, Timegrapher or Magnetometer ∞?

Magnetometer ∞ is rated higher. Timegrapher averages 2.8 out of 5 from 46 ratings, while Magnetometer ∞ averages 4.4 from 59 ratings.

### Do Timegrapher or Magnetometer ∞ have ads?

Magnetometer ∞ shows ads; Timegrapher does not.

### Which is updated more often, Timegrapher or Magnetometer ∞?

Timegrapher ships an update every 8 months, and Magnetometer ∞ every 2 weeks. Most recently, Timegrapher was updated on October 27, 2026 and Magnetometer ∞ on October 24, 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.*