# Rect Clock vs Atomic Clock PRO

The clearest difference is rating: Atomic Clock PRO at 4.7 against Rect Clock's 3.7. Atomic Clock PRO also leads on ratings volume (10K vs 168) and review sentiment (73% vs 59%). Rect Clock's advantage is 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. Rect Clock sells 5 one-off in-app purchases and Atomic Clock PRO sells 2 in-app purchases, starting at $1.99 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 3.7. That said, the two scores are not equally well evidenced: Atomic Clock PRO has 10K ratings behind it against 168, so its average is the more settled of the two. Written reviews point the same way: 59% of Rect Clock's written reviews are positive against 73% of Atomic Clock PRO's.

Rect Clock ships an update monthly, Atomic Clock PRO every 3 months. Both last shipped on September 26, 2026.

## The numbers

| Metric | Rect Clock | Atomic Clock PRO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (168 ratings)](https://appshunter.io/ios/app/rect-clock/id398188215/reviews) | **[4.7 (10K ratings)](https://appshunter.io/ios/app/atomic-clock-pro/id899090224/reviews)** |
| Number of ratings | 168 | **10K** |
| Positive reviews | 58.7% of reviews | **72.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 178 MB | 6 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [y-design](https://appshunter.io/developer/398188218) | [Brachmann Online Marketing GmbH & Co. KG](https://appshunter.io/developer/682848918) |

## What reviewers say

### Rect Clock

[App page](https://appshunter.io/ios/app/rect-clock/id398188215)

This app transforms your iPhone into a full-screen analog clock. Customize the clock face, index, and hands with various styles and colors. Enjoy a minimalist design with adjustable screen rotation and optional date display and auto-lock.

**Highlights:** Full-screen analog display, Customizable clock faces, Interchangeable index styles, Variety of hand designs, Adjustable hand movement, Screen rotation support, Configurable date and lock

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add All Faces | $0.99 | one-time |
| Add All Indexes | $0.99 | one-time |
| Add All Hands | $0.99 | one-time |
| Remove Ads | $0.99 | one-time |
| Full Version | $2.99 | one-time |

**What reviewers like**

- ✨ Beautiful, elegant, minimalist design
- 👍 Easy to use and intuitive interface
- 🎨 Multiple customizable clock faces and styles
- 📱 Works well as a bedside/desk clock
- ⏱️ Accurate time display

**What reviewers complain about**

- 🐛 App doesn't stay on screen (goes to sleep with phone)
- 🐛 Blank white screen display issues on some devices
- 💸 Monetization model with ads and paywalls
- ❌ Cannot be set as lock screen or wallpaper
- ❌ Limited functionality compared to native clock

**Reported bugs**

- Blank white screen on launch (iPhone XR, iPad Air 2)
- App doesn't stay on when phone locks
- App crashes or won't open after purchase
- Settings screen appears on any touch
- Unresponsive UI elements on iPad

**Requested features**

- Alarm functionality
- Lock screen integration
- Live wallpaper capability
- Apple Watch compatibility
- Landscape/rotation support


### 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


## Frequently asked questions

### Is Rect Clock free?

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

### Is Atomic Clock PRO free?

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

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

Atomic Clock PRO is rated higher. Rect Clock averages 3.7 out of 5 from 168 ratings, while Atomic Clock PRO averages 4.7 from 10K ratings.

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

Both Rect Clock and Atomic Clock PRO show ads.

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

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