# CalculatorRed vs Arithon Calculator

The clearest difference is update cadence: Arithon Calculator at weekly against CalculatorRed's every 4 weeks. Arithon Calculator also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

CalculatorRed ships an update every 4 weeks, Arithon Calculator weekly. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CalculatorRed | Arithon Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Weekly** |
| Size | 1 MB | 31 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kodwerk Software Ltd.](https://appshunter.io/developer/1741040469) | [Mind Mirage Apps Ltd](https://appshunter.io/developer/1896465995) |

## What reviewers say

### CalculatorRed

[App page](https://appshunter.io/ios/app/calculatorred/id6496602010)

**Features:** macOS Compatibility

**In-app purchases:** none


### Arithon Calculator

[App page](https://appshunter.io/ios/app/arithon-calculator/id6767340730)

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

**In-app purchases:** none


## Frequently asked questions

### Is CalculatorRed free?

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

### Is Arithon Calculator free?

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

### Do CalculatorRed or Arithon Calculator have ads?

Neither CalculatorRed nor Arithon Calculator shows ads.

### Which is updated more often, CalculatorRed or Arithon Calculator?

CalculatorRed ships an update every 4 weeks, and Arithon Calculator weekly. Most recently, CalculatorRed was updated on November 8, 2026 and Arithon Calculator on October 31, 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.*