# Emerald Chronometer vs Timegrapher

The clearest difference is rating: Emerald Chronometer at 4.9 against Timegrapher's 2.8. Emerald Chronometer also leads on review sentiment (97% vs 55%) and in-app purchases (none vs 1). Timegrapher's advantage is update cadence (every 8 months vs every 22 months). On price, ratings volume, device support and iOS requirement there is nothing between them.

Both are free to download. Timegrapher sells 1 one-off in-app purchase. Emerald Chronometer asks for nothing beyond the download.

Emerald Chronometer holds the better App Store score, 4.9 against 2.8. Both are backed by a comparable volume of ratings — 105 and 44 respectively. Written reviews point the same way: 97% of Emerald Chronometer's written reviews are positive against 55% of Timegrapher's.

Emerald Chronometer ships an update every 22 months, Timegrapher every 8 months. The most recent releases landed on October 18, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Emerald Chronometer | Timegrapher |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (105 ratings)](https://appshunter.io/ios/app/emerald-chronometer/id284953670/reviews)** | [2.8 (44 ratings)](https://appshunter.io/ios/app/timegrapher-watch-accuracy/id6450460771/reviews) |
| Number of ratings | **105** | 44 |
| Positive reviews | **96.8% of reviews** | 55.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 22 months | **Every 8 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 311 MB | 9 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Scapa Flow, LLC](https://appshunter.io/developer/635350184) | [Attila Lelko](https://appshunter.io/developer/1693385247) |

## What reviewers say

### Emerald Chronometer

[App page](https://appshunter.io/ios/app/emerald-chronometer/id284953670)

Experience highly detailed mechanical watch faces with advanced astronomical and clock complications. Track celestial events, manage time with precision, and explore historical and future dates with interactive displays. Optimized for iPhone and iPod touch.

**Highlights:** Accurate astronomical data (4000 BCE - 2800 CE), Sun, Moon, and planet rise/set times, Mechanical display of Moon phases, Precise local and UTC time, Chronograph with split timer, World-time and calendar watches, Interactive time-travel simulation

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Emerald Chronometer free?

Emerald Chronometer is free to download, with no in-app purchases.

### Is Timegrapher free?

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

### Which has better reviews, Emerald Chronometer or Timegrapher?

Emerald Chronometer is rated higher. Emerald Chronometer averages 4.9 out of 5 from 105 ratings, while Timegrapher averages 2.8 from 44 ratings.

### Which is updated more often, Emerald Chronometer or Timegrapher?

Emerald Chronometer ships an update every 22 months, and Timegrapher every 8 months. Most recently, Emerald Chronometer was updated on October 18, 2026 and Timegrapher on October 17, 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.*