# Premium Clock Collection vs Time Calibrator

The clearest difference is rating: Premium Clock Collection at 4.6 against Time Calibrator's 2.7. Premium Clock Collection also leads on ratings volume (56 vs 3) and iOS requirement (13 vs 15.6). Time Calibrator's advantage is in-app purchases (none vs 8) and update cadence (every 8 months vs every 23 months). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Premium Clock Collection sells 8 one-off in-app purchases. Time Calibrator asks for nothing beyond the download.

Premium Clock Collection holds the better App Store score, 4.6 against 2.7. That said, the two scores are not equally well evidenced: Premium Clock Collection has 56 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 38% of Premium Clock Collection's written reviews are positive against 33% of Time Calibrator's.

Premium Clock Collection ships an update every 23 months, Time Calibrator every 8 months. Both last shipped on October 23, 2026.

## The numbers

| Metric | Premium Clock Collection | Time Calibrator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (56 ratings)](https://appshunter.io/ios/app/premium-clock-collection/id772521042/reviews)** | [2.7 (3 ratings)](https://appshunter.io/ios/app/time-calibrator/id786988278/reviews) |
| Number of ratings | **56** | 3 |
| Positive reviews | **37.5% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 23 months | **Every 8 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 3 MB | 8 MB |
| Requires iOS | **13** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Atomtime Suisse S.A.](https://appshunter.io/developer/786988281) |

## What reviewers say

### Premium Clock Collection

[App page](https://appshunter.io/ios/app/premium-clock-collection/id772521042)

Enhance your iOS device with a collection of beautifully designed analog clocks. Customize their appearance, toggle display elements like date and seconds, and set reminders. Optimized for OLED screens to save battery and prevent burn-in.

**Highlights:** Customizable clock and hand styles, Toggle date, second hand, and battery level, Set reminders and notifications, OLED screen optimization, Adjustable brightness, Quick settings access

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Clock 1 | $0.99 | one-time |
| Premium Clock 2 | $0.99 | one-time |
| Premium Clock 3 | $0.99 | one-time |
| Premium Clock 4 | $0.99 | one-time |
| Premium Clock 5 | $0.99 | one-time |
| Premium Clock 6 | $0.99 | one-time |
| Premium Clock 7 | $0.99 | one-time |
| Premium Clock 8 | $0.99 | one-time |


### Time Calibrator

[App page](https://appshunter.io/ios/app/time-calibrator/id786988278)

This utility app provides precise local time and date information by connecting to an atomic clock server in Switzerland. It utilizes quantum technology to transmit this data at the speed of light directly to compatible i-Atomic watches.

**Highlights:** Accurate global time and date, Connects to Swiss atomic clock server, Quantum technology data transmission, Direct communication to i-Atomic watches, Light signal synchronization

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Premium Clock Collection free?

Premium Clock Collection is free to download, with in-app purchases available.

### Is Time Calibrator free?

Time Calibrator is free to download, with no in-app purchases.

### Which has better reviews, Premium Clock Collection or Time Calibrator?

Premium Clock Collection is rated higher. Premium Clock Collection averages 4.6 out of 5 from 56 ratings, while Time Calibrator averages 2.7 from 3 ratings.

### Do Premium Clock Collection or Time Calibrator have ads?

Neither Premium Clock Collection nor Time Calibrator shows ads.

### Which is updated more often, Premium Clock Collection or Time Calibrator?

Premium Clock Collection ships an update every 23 months, and Time Calibrator every 8 months. Most recently, Premium Clock Collection was updated on October 23, 2026 and Time Calibrator on October 23, 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.*