# Atomic Clock PRO vs OLEDX

The clearest difference is ads: OLEDX at none against Atomic Clock PRO's shown. OLEDX also leads on iOS requirement (13.0 vs 15.6). Atomic Clock PRO's advantage is review sentiment (73% vs 49%) and update cadence (every 3 months vs every 10 months). On price, rating, ratings volume 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 OLEDX sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for Atomic Clock PRO against 4.6 for OLEDX. Both are backed by a comparable volume of ratings — 10K and 5.2K respectively. Written reviews are what separate them: 73% of Atomic Clock PRO's written reviews are positive against 49% of OLEDX's.

Atomic Clock PRO ships an update every 3 months, OLEDX every 10 months. Both last shipped on September 25, 2026.

## The numbers

| Metric | Atomic Clock PRO | OLEDX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (10K ratings)](https://appshunter.io/ios/app/atomic-clock-pro/id899090224/reviews)** | [4.6 (5.2K ratings)](https://appshunter.io/ios/app/oledx/id1312667557/reviews) |
| Number of ratings | **10K** | 5.2K |
| Positive reviews | **72.7% of reviews** | 48.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 10 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 7 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Brachmann Online Marketing GmbH & Co. KG](https://appshunter.io/developer/682848918) | [Ronan Stark](https://appshunter.io/developer/968657679) |

## 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


### OLEDX

[App page](https://appshunter.io/ios/app/oledx/id1312667557)

Enhance your iPhone's OLED display with a customizable clock and information interface. View time, weather, battery, personal notes, and icons with energy-efficient, visually striking designs. Features include dual time zones, analog/digital clocks, and adjustable brightness.

**Highlights:** Display Time and Date, Current Weather Face, Display Battery Information, Display Icon or Personal Note, Dual Time Zone Interface, Analog Or Digital Clock, Energy Efficient, Multiple Watch Faces

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OLEDX Premium | $3.99 | one-time |

**What reviewers like**

- 👍 Nice display
- 👍 Good for nightstand use
- 👍 Customizable clock faces
- 👍 Works well on iPhone
- 👍 Useful app

**What reviewers complain about**

- 🐛 Screen turns off after a while
- 🔋 Battery drain issues
- 🐛 Notifications not working
- 🐛 Time not syncing correctly
- 🐛 Paid features not working as expected

**Reported bugs**

- Screen goes black after some time
- Time display not accurate
- Paid features not working
- Compatibility issues with newer iPhones

**Requested features**

- Add weather information
- Allow custom wallpapers
- Improve alarm functionality
- Add notification support
- Improve brightness/dimming controls


## Frequently asked questions

### Is Atomic Clock PRO free?

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

### Is OLEDX free?

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

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

Atomic Clock PRO is rated higher. Atomic Clock PRO averages 4.7 out of 5 from 10K ratings, while OLEDX averages 4.6 from 5.2K ratings.

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

Atomic Clock PRO shows ads; OLEDX does not.

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

Atomic Clock PRO ships an update every 3 months, and OLEDX every 10 months. Most recently, Atomic Clock PRO was updated on September 25, 2026 and OLEDX on September 25, 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.*