# AtomicClock vs PRO TREK Connected

The clearest difference is review sentiment: AtomicClock at 84% against PRO TREK Connected's 48%. AtomicClock also leads on ratings volume (5.5K vs 345) and rating (4.8 vs 4.6). PRO TREK Connected's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. AtomicClock sells 1 one-off in-app purchase. PRO TREK Connected asks for nothing beyond the download.

AtomicClock holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: AtomicClock has 5.5K ratings behind it against 345, so its average is the more settled of the two. Written reviews point the same way: 84% of AtomicClock's written reviews are positive against 48% of PRO TREK Connected's.

AtomicClock ships an update every 3 weeks, PRO TREK Connected every 2 months. The most recent releases landed on October 14, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | AtomicClock | PRO TREK Connected |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5.5K ratings)](https://appshunter.io/ios/app/atomicclock-ntp-time/id1402993049/reviews)** | [4.6 (345 ratings)](https://appshunter.io/ios/app/pro-trek-connected/id1456086278/reviews) |
| Number of ratings | **5.5K** | 345 |
| Positive reviews | **84.2% of reviews** | 48.4% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 242 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Timo Partl](https://appshunter.io/developer/1387413672) | [CASIO COMPUTER CO., LTD.](https://appshunter.io/developer/456569836) |

## What reviewers say

### AtomicClock

[App page](https://appshunter.io/ios/app/atomicclock-ntp-time/id1402993049)

This app displays the exact current time synchronized with NTP servers, offering a customizable clock view for precise time checks. It's ideal for setting watches, verifying timestamps, or comparing local and network time.

**Highlights:** Precise time from NTP servers, Customizable clock faces, Select or add time servers, Local and UTC views, 12/24 hour modes, Customizable time format, Acoustic ticking

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro Version | $6.99 | one-time |

**What reviewers like**

- 🚀 Accurate time
- 👍 Highly customizable
- 🚀 Precise to the second
- 👍 Easy to use
- 👍 Helpful for setting watches

**What reviewers complain about**

- 🐛 Server connection issues
- 🔍 Limited time zone options
- 💰 Ads diminish clock view
- 🔍 Lacks some advanced features
- 🔍 Redundant for some users

**Reported bugs**

- Crashes on certain iOS versions
- Occasional freezing of hands
- Countdown timer sound not working

**Requested features**

- Add GMT/dual time display
- Implement widget support
- Add different second hand sounds
- Allow setting background color to match watch
- Include alarm/timer functionality


### PRO TREK Connected

[App page](https://appshunter.io/ios/app/pro-trek-connected/id1456086278)

This app connects your compatible CASIO watch to your iPhone via Bluetooth. It enables various Mobile Link functions to enhance your watch experience and allows for simplified watch operations through your phone's screen. Data can be transferred to the new CASIO WATCHES app.

**Highlights:** Bluetooth watch connectivity, Mobile Link functions, Simplified watch operations, User data transfer, iPhone integration

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Useful app for Pro Trek
- ⌚️ Seamless watch connection
- 🧭 Multifunctional watch features
- 💪 Robust and durable watch
- ⏱️ Accurate timekeeping

**What reviewers complain about**

- 📉 Complicated to use
- ❓ Manual difficult to read
- 🔌 Watch not connecting
- ⏳ Auto backlight turns off
- ⚙️ Watch constantly out of sync

**Reported bugs**

- New version not updating
- Watch not connecting after update
- Auto backlight turns off randomly
- Step counter weekly view off by one day
- Watch constantly out of time

**Requested features**

- Add Russian language support
- Improve app intuitiveness and simplicity
- Add ability to locate lost watch
- Enhance fishing port data
- Increase domestic data


## Frequently asked questions

### Is AtomicClock free?

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

### Is PRO TREK Connected free?

PRO TREK Connected is free to download, with no in-app purchases.

### Which has better reviews, AtomicClock or PRO TREK Connected?

AtomicClock is rated higher. AtomicClock averages 4.8 out of 5 from 5.5K ratings, while PRO TREK Connected averages 4.6 from 345 ratings.

### Do AtomicClock or PRO TREK Connected have ads?

AtomicClock shows ads; PRO TREK Connected does not.

### Which is updated more often, AtomicClock or PRO TREK Connected?

AtomicClock ships an update every 3 weeks, and PRO TREK Connected every 2 months. Most recently, AtomicClock was updated on October 14, 2026 and PRO TREK Connected on October 2, 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.*