# OLED Clock vs SClock

The clearest difference is in-app purchases: OLED Clock at none against SClock's 1. OLED Clock also leads on ads (none vs shown) and review sentiment (79% vs 50%). SClock's advantage is rating (4.3 vs 3.9). On price, ratings volume and update cadence there is nothing between them.

Both are free to download. SClock sells 1 in-app purchase, starting at $0.99 per month. OLED Clock asks for nothing beyond the download.

SClock holds the better App Store score, 4.3 against 3.9. Both are backed by a comparable volume of ratings — 15 and 24 respectively. Written reviews complicate that: 79% of OLED Clock's written reviews are positive against 50% of SClock's, so the app with the better star average is not the one people write more warmly about.

OLED Clock ships an update every 4 weeks, SClock fortnightly. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | OLED Clock | SClock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (15 ratings)](https://appshunter.io/ios/app/oled-clock/id1364541962/reviews) | **[4.3 (24 ratings)](https://appshunter.io/ios/app/sclock-big-digital-clock/id1633448389/reviews)** |
| Number of ratings | 15 | **24** |
| Positive reviews | **78.6% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 10 MB | 30 MB |
| Requires iOS | **12.0** | 16.1 |
| Devices | **iPhone, iPad, iPod, Apple TV** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Christian Moeller](https://appshunter.io/developer/1364541961) | [Hajime Suzuki](https://appshunter.io/developer/1615906018) |

## What reviewers say

### OLED Clock

[App page](https://appshunter.io/ios/app/oled-clock/id1364541962)

This app displays a dynamic clock designed to prevent OLED screen burn-in by constantly moving and changing colors. It offers customizable digital and analog views with various fonts, sizes, and animation speeds.

**Highlights:** OLED burn-in prevention, Animated clock movement, Color cycling, Digital and analog views, Customizable fonts and size, Adjustable animation speed

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

**In-app purchases:** none


### SClock

[App page](https://appshunter.io/ios/app/sclock-big-digital-clock/id1633448389)

This app offers a customizable clock with adjustable display sizes and color options. It features dual timers with customizable sounds and visual cues, perfect for time management tasks like Pomodoro.

**Highlights:** Adjustable display size, Color selectable clock face, Dual timer functionality, Customizable countdown sounds, Color-coded time display, Simple, easy-to-read design

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| premium | $0.99 | per month |


## Frequently asked questions

### Is OLED Clock free?

OLED Clock is free to download, with no in-app purchases.

### Is SClock free?

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

### Which has better reviews, OLED Clock or SClock?

SClock is rated higher. OLED Clock averages 3.9 out of 5 from 15 ratings, while SClock averages 4.3 from 24 ratings.

### Do OLED Clock or SClock have ads?

SClock shows ads; OLED Clock does not.

### Which is updated more often, OLED Clock or SClock?

OLED Clock ships an update every 4 weeks, and SClock fortnightly. Most recently, OLED Clock was updated on October 7, 2026 and SClock on October 6, 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.*