# Big clock vs OLED Clock

The clearest difference is rating: OLED Clock at 3.9 against Big clock's 2.1. OLED Clock also leads on review sentiment (79% vs 43%). Big clock's advantage is iOS requirement (8.1 vs 12.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

OLED Clock holds the better App Store score, 3.9 against 2.1. Both are backed by a comparable volume of ratings — 7 and 15 respectively. Written reviews point the same way: 43% of Big clock's written reviews are positive against 79% of OLED Clock's.

Big clock ships an update every 2 weeks, OLED Clock every 4 weeks. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Big clock | OLED Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (7 ratings)](https://appshunter.io/ios/app/big-clock-day-and-night-mode/id906420263/reviews) | **[3.9 (15 ratings)](https://appshunter.io/ios/app/oled-clock/id1364541962/reviews)** |
| Number of ratings | 7 | **15** |
| Positive reviews | 43.5% of reviews | **78.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 4 weeks |
| Monetization | Free | Free |
| Size | 4 MB | 10 MB |
| Requires iOS | **8.1** | 12.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [Sakura apps](https://appshunter.io/developer/506336348) | [Christian Moeller](https://appshunter.io/developer/1364541961) |

## What reviewers say

### Big clock

[App page](https://appshunter.io/ios/app/big-clock-day-and-night-mode/id906420263)

A simple utility app offering a large digital clock and stopwatch functionality. It features customizable backgrounds to suit day or night viewing.

**Highlights:** Digital clock display, Stopwatch functionality, Day mode background, Night mode background, White background option, Black background option

**Features:** macOS Compatibility

**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 free?

Big clock is free to download, 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 or OLED Clock?

OLED Clock is rated higher. Big clock averages 2.1 out of 5 from 7 ratings, while OLED Clock averages 3.9 from 15 ratings.

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

Neither Big clock nor OLED Clock shows ads.

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

Big clock ships an update every 2 weeks, and OLED Clock every 4 weeks. Most recently, Big clock was updated on November 1, 2026 and OLED Clock on November 2, 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.*