# Atomic Clock PRO vs Clock Watching

The clearest difference is ads: Clock Watching at none against Atomic Clock PRO's shown. Clock Watching also leads on review sentiment (100% vs 73%) and update cadence (every 3 weeks vs every 3 months). Atomic Clock PRO's advantage is ratings volume (10K vs 1) and iOS requirement (15.6 vs 17.0). On price, in-app purchases, monetization model and device support 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 Clock Watching sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Clock Watching 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 point the same way: 73% of Atomic Clock PRO's written reviews are positive against 100% of Clock Watching's.

Atomic Clock PRO ships an update every 3 months, Clock Watching every 3 weeks. The most recent releases landed on September 28, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Atomic Clock PRO | Clock Watching |
| --- | --- | --- |
| 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/clock-watching/id1315298368/reviews)** |
| Number of ratings | **10K** | 1 |
| Positive reviews | 72.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 1 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [Brachmann Online Marketing GmbH & Co. KG](https://appshunter.io/developer/682848918) | [David Thorpe](https://appshunter.io/developer/1315298367) |

## 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


### Clock Watching

[App page](https://appshunter.io/ios/app/clock-watching/id1315298368)

This app displays the current time using a four-digit digital format for hours and minutes. An optional in-app purchase adds animated seconds with pendulums that fall or explode as each minute completes.

**Highlights:** Four-digit time display, Hour and minute tracking, Animated seconds (in-app purchase), Pendulum animation, Minute completion effects

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add Animated Seconds | $1.99 | one-time |


## Frequently asked questions

### Is Atomic Clock PRO free?

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

### Is Clock Watching free?

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

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

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

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

Atomic Clock PRO shows ads; Clock Watching does not.

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

Atomic Clock PRO ships an update every 3 months, and Clock Watching every 3 weeks. Most recently, Atomic Clock PRO was updated on September 28, 2026 and Clock Watching on June 1, 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.*