# Big Clock HD vs OLED Clock

The clearest difference is price: OLED Clock at Free against Big Clock HD's $0.49. OLED Clock also leads on rating (3.9 vs 3.0) and review sentiment (79% vs 45%). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

OLED Clock is free to download; Big Clock HD costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

OLED Clock holds the better App Store score, 3.9 against 3.0. Both are backed by a comparable volume of ratings — 23 and 15 respectively. Written reviews point the same way: 45% of Big Clock HD's written reviews are positive against 79% of OLED Clock's.

Big Clock HD ships an update every 29 months, OLED Clock every 4 weeks. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Big Clock HD | OLED Clock |
| --- | --- | --- |
| Price | $0.49 | **Free** |
| Rating | [3.0 (23 ratings)](https://appshunter.io/ios/app/big-clock-hd/id364394834/reviews) | **[3.9 (15 ratings)](https://appshunter.io/ios/app/oled-clock/id1364541962/reviews)** |
| Number of ratings | **23** | 15 |
| Positive reviews | 45.5% of reviews | **78.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 4 weeks** |
| Monetization | Free | Free |
| Size | 1 MB | 10 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | **iPhone, iPad, iPod, Mac, Apple TV** | iPhone, iPad, iPod, Apple TV |
| Age rating | 4+ | 4+ |
| Developer | [TheCodingMonkeys](https://appshunter.io/developer/284181889) | [Christian Moeller](https://appshunter.io/developer/1364541961) |

## What reviewers say

### Big Clock HD

[App page](https://appshunter.io/ios/app/big-clock-hd/id364394834)

This app displays a large, easily readable digital clock on your device, perfect for viewing from afar. It supports all iOS locales and can prevent your device from auto-locking while the clock is displayed. Additional features include seconds display and widgets.

**Highlights:** Large, readable date and time display, Supports all iOS locales, Prevents auto-locking, Optional seconds display, Widgets

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Big Clock HD free?

Big Clock HD costs $0.49, with no in-app purchases.

### Is OLED Clock free?

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

### Which has better reviews, Big Clock HD or OLED Clock?

OLED Clock is rated higher. Big Clock HD averages 3.0 out of 5 from 23 ratings, while OLED Clock averages 3.9 from 15 ratings.

### Do Big Clock HD or OLED Clock have ads?

Neither Big Clock HD nor OLED Clock shows ads.

### Which is updated more often, Big Clock HD or OLED Clock?

Big Clock HD ships an update every 29 months, and OLED Clock every 4 weeks. Most recently, Big Clock HD was updated on October 13, 2026 and OLED Clock on October 7, 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.*