# Atomic Clock PRO vs ClockDisplay

The clearest difference is rating: Atomic Clock PRO at 4.7 against ClockDisplay's 3.5. Atomic Clock PRO also leads on ratings volume (10K vs 6). ClockDisplay's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.6). On price, review sentiment, update cadence and in-app purchases 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 ClockDisplay sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Atomic Clock PRO holds the better App Store score, 4.7 against 3.5. That said, the two scores are not equally well evidenced: Atomic Clock PRO has 10K ratings behind it against 6, 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 67% of ClockDisplay's.

Atomic Clock PRO ships an update every 3 months, ClockDisplay every 4 months. The most recent releases landed on September 26, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Atomic Clock PRO | ClockDisplay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (10K ratings)](https://appshunter.io/ios/app/atomic-clock-pro/id899090224/reviews)** | [3.5 (6 ratings)](https://appshunter.io/ios/app/clockdisplay-time-wallpapers/id1485213433/reviews) |
| Number of ratings | **10K** | 6 |
| Positive reviews | **72.7% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free with in-app purchases | Freemium |
| Size | 6 MB | 17 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Brachmann Online Marketing GmbH & Co. KG](https://appshunter.io/developer/682848918) | [Abdulla Yasin](https://appshunter.io/developer/1407887788) |

## 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


### ClockDisplay

[App page](https://appshunter.io/ios/app/clockdisplay-time-wallpapers/id1485213433)

Transform your iPhone or iPad into a beautiful, aesthetic digital clock with customizable wallpapers. Displays time, date, and battery status with large, easy-to-read fonts. Offers a free version with premium subscription options for enhanced features.

**Highlights:** Digital clock wallpaper, Customizable size and color, Displays time, date, and battery, Over 200 clock display wallpapers, Use personal photos as background, Full screen time display, Large clock font

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Month Subscription | $2.99 | per month |
| Three Month Subscription | $8.99 | per 3 months |
| One Year Subscription | $17.99 | per year |
| Life Time Purchasing | $24.99 | one-time |


## Frequently asked questions

### Is Atomic Clock PRO free?

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

### Is ClockDisplay free?

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

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

Atomic Clock PRO is rated higher. Atomic Clock PRO averages 4.7 out of 5 from 10K ratings, while ClockDisplay averages 3.5 from 6 ratings.

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

Atomic Clock PRO shows ads; ClockDisplay does not.

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

Atomic Clock PRO ships an update every 3 months, and ClockDisplay every 4 months. Most recently, Atomic Clock PRO was updated on September 26, 2026 and ClockDisplay 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.*