# Emerald Chronometer vs SmartwatchCenter

The clearest difference is in-app purchases: Emerald Chronometer at none against SmartwatchCenter's 3. Emerald Chronometer also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). SmartwatchCenter's advantage is update cadence (daily vs every 22 months). On price there is nothing between them.

Both are free to download. SmartwatchCenter sells 3 in-app purchases, starting at $2.99 per month. Emerald Chronometer asks for nothing beyond the download.

Emerald Chronometer ships an update every 22 months, SmartwatchCenter daily. Both last shipped on November 6, 2026.

## The numbers

| Metric | Emerald Chronometer | SmartwatchCenter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (122 ratings)](https://appshunter.io/ios/app/emerald-chronometer/id284953670/reviews)** | — |
| Number of ratings | **122** | — |
| Positive reviews | 96.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 22 months | **Daily** |
| Monetization | Paid | — |
| Size | 311 MB | 13 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Scapa Flow, LLC](https://appshunter.io/developer/635350184) | [Khang Tran](https://appshunter.io/developer/1689882869) |

## 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


### SmartwatchCenter

[App page](https://appshunter.io/ios/app/smartwatchcenter/id6796858380)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $2.99 | per month |
| Pro Yearly | $17.99 | per year |
| Pro Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Emerald Chronometer free?

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

### Is SmartwatchCenter free?

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

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

Emerald Chronometer ships an update every 22 months, and SmartwatchCenter daily. Most recently, Emerald Chronometer was updated on November 6, 2026 and SmartwatchCenter on November 6, 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.*