# OLED Clock vs Fire Calculator

The clearest difference is update cadence: OLED Clock at every 4 weeks against Fire Calculator's every 65 months. OLED Clock also leads on device support and iOS requirement (12.0 vs 15.1). On price and in-app purchases 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 ships an update every 4 weeks, Fire Calculator every 65 months. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | OLED Clock | Fire Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (15 ratings)](https://appshunter.io/ios/app/oled-clock/id1364541962/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 78.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | **Every 4 weeks** | Every 65 months |
| Monetization | Free | — |
| Size | 10 MB | 37 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod, Apple TV** | — |
| Age rating | 4+ | 4+ |
| Developer | [Christian Moeller](https://appshunter.io/developer/1364541961) | [Burak Bilgin](https://appshunter.io/developer/1501098450) |

## 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


### Fire Calculator

[App page](https://appshunter.io/ios/app/fire-calculator/id1535503681)

**In-app purchases:** none


## Frequently asked questions

### Is OLED Clock free?

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

### Is Fire Calculator free?

Fire Calculator is free to download, with no in-app purchases.

### Which is updated more often, OLED Clock or Fire Calculator?

OLED Clock ships an update every 4 weeks, and Fire Calculator every 65 months. Most recently, OLED Clock was updated on October 13, 2026 and Fire Calculator on October 11, 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.*