# Emerald Chronometer vs Precise Timestamp

The clearest difference is monetization model: Precise Timestamp at free against Emerald Chronometer's paid. Precise Timestamp also leads on update cadence (every 5 weeks vs every 22 months) and iOS requirement (13.0 vs 15.0). Emerald Chronometer's advantage is ratings volume (105 vs 7). On price, rating, review sentiment and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.9 for Emerald Chronometer against 5.0 for Precise Timestamp. That said, the two scores are not equally well evidenced: Emerald Chronometer has 105 ratings behind it against 7, so its average is the more settled of the two. Written reviews are what separate them: 97% of Emerald Chronometer's written reviews are positive against 100% of Precise Timestamp's.

Emerald Chronometer ships an update every 22 months, Precise Timestamp every 5 weeks. The most recent releases landed on September 18, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | Emerald Chronometer | Precise Timestamp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (105 ratings)](https://appshunter.io/ios/app/emerald-chronometer/id284953670/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/precise-timestamp/id6463294734/reviews)** |
| Number of ratings | **105** | 7 |
| Positive reviews | 96.8% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 22 months | **Every 5 weeks** |
| Monetization | Paid | **Free** |
| Size | 311 MB | 19 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Scapa Flow, LLC](https://appshunter.io/developer/635350184) | [Chris Gillin](https://appshunter.io/developer/1565599090) |

## 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


### Precise Timestamp

[App page](https://appshunter.io/ios/app/precise-timestamp/id6463294734)

Capture events with unparalleled accuracy, down to the tenth of a second. Synchronize with NTP servers for precise timekeeping and view detailed sync information. Organize events with descriptions and toggle between absolute and relative time displays.

**Highlights:** NTP server synchronization, Tenth-of-a-second accuracy, Absolute and relative time modes, Event descriptions, Event sorting and grouping, Sync time details

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Emerald Chronometer free?

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

### Is Precise Timestamp free?

Precise Timestamp is free to download, with no in-app purchases.

### Which has better reviews, Emerald Chronometer or Precise Timestamp?

Precise Timestamp is rated higher. Emerald Chronometer averages 4.9 out of 5 from 105 ratings, while Precise Timestamp averages 5.0 from 7 ratings.

### Which is updated more often, Emerald Chronometer or Precise Timestamp?

Emerald Chronometer ships an update every 22 months, and Precise Timestamp every 5 weeks. Most recently, Emerald Chronometer was updated on September 18, 2026 and Precise Timestamp on September 3, 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.*