# Atomic Clock PRO vs iWatch

The clearest difference is review sentiment: Atomic Clock PRO at 73% against iWatch's 0%. Atomic Clock PRO also leads on ratings volume (10K vs 1). iWatch's advantage is rating (5.0 vs 4.7) and update cadence (monthly vs every 3 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Atomic Clock PRO sells 2 in-app purchases, starting at $1.99 per month and iWatch sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

iWatch holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Atomic Clock PRO has 10K ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 73% of Atomic Clock PRO's written reviews are positive against 0% of iWatch's, so the app with the better star average is not the one people write more warmly about.

Atomic Clock PRO ships an update every 3 months, iWatch monthly. The most recent releases landed on October 28, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Atomic Clock PRO | iWatch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (10K ratings)](https://appshunter.io/ios/app/atomic-clock-pro/id899090224/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/iwatch-the-cool-watch/id6449888918/reviews)** |
| Number of ratings | **10K** | 1 |
| Positive reviews | **73.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 9 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Brachmann Online Marketing GmbH & Co. KG](https://appshunter.io/developer/682848918) | [Takao Ichimura](https://appshunter.io/developer/1474061593) |

## What reviewers say

### Atomic Clock PRO

[App page](https://appshunter.io/ios/app/atomic-clock-pro/id899090224)

Get the most accurate time from an official atomic clock server. This app automatically detects your time zone and allows custom backgrounds. Easily switch between digital and analog clock displays with a swipe.

**Highlights:** Exact time from atomic clock, Automatic time zone recognition, Customizable background images, Digital and analog clock modes, Optional sound alerts, Color customization

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $1.99 | per month |
| Remove Ads | $5.99 | one-time |

**What reviewers like**

- ⭐ Accurate time display
- 📟 Useful for timing events
- 🕰️ Helpful for setting other clocks
- 🔍 Large, easy-to-read clock face

**What reviewers complain about**

- 💸 Subscription model for ad-free version
- 📢 Excessive advertisements
- 🔍 Small font for seconds display
- 🔀 Difficulty in displaying both analog and digital clocks simultaneously

**Reported bugs**

- Second hand occasionally runs in reverse
- Digital clock display cuts off on some devices
- Inconsistent behavior when switching between clock types

**Requested features**

- Customizable clock face options
- Ability to set widget on home screen
- Sync with system clock to automatically update time


### iWatch

[App page](https://appshunter.io/ios/app/iwatch-the-cool-watch/id6449888918)

This digital watch app offers a large, easy-to-read display with accurate second updates, preventing time skipping. Customize themes and switch between 12/24 hour formats. Supports iPad split view.

**Highlights:** Accurate second display, Large, easy-to-read interface, Customizable theme colors, 12/24 hour format switching, iPad Split View and Slide Over support

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $0.99 | per month |
| Yearly Plan | $2.99 | per year |
| Remove Ads and Add Features | $2.99 | one-time |


## Frequently asked questions

### Is Atomic Clock PRO free?

Atomic Clock PRO is free to download, with in-app purchases available.

### Is iWatch free?

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

### Which has better reviews, Atomic Clock PRO or iWatch?

iWatch is rated higher. Atomic Clock PRO averages 4.7 out of 5 from 10K ratings, while iWatch averages 5.0 from 1 ratings.

### Do Atomic Clock PRO or iWatch have ads?

Both Atomic Clock PRO and iWatch show ads.

### Which is updated more often, Atomic Clock PRO or iWatch?

Atomic Clock PRO ships an update every 3 months, and iWatch monthly. Most recently, Atomic Clock PRO was updated on October 28, 2026 and iWatch on October 26, 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.*