# Simple Calculator Multi vs Retro Calc

The clearest difference is update cadence: Retro Calc at every 3 weeks against Simple Calculator Multi's every 13 months. Simple Calculator Multi's advantage is 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.

Simple Calculator Multi ships an update every 13 months, Retro Calc every 3 weeks. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Simple Calculator Multi | Retro Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Size | 25 MB | 0 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [tadashi endo](https://appshunter.io/developer/1605441215) | [Shuji Okuno](https://appshunter.io/developer/6784051738) |

## What reviewers say

### Simple Calculator Multi

[App page](https://appshunter.io/ios/app/simple-calculator-multi-screen/id1605441213)

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

**In-app purchases:** none


### Retro Calc

[App page](https://appshunter.io/ios/app/retro-calc-simple-calculator/id6784051736)

**In-app purchases:** none


## Frequently asked questions

### Is Simple Calculator Multi free?

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

### Is Retro Calc free?

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

### Do Simple Calculator Multi or Retro Calc have ads?

Neither Simple Calculator Multi nor Retro Calc shows ads.

### Which is updated more often, Simple Calculator Multi or Retro Calc?

Simple Calculator Multi ships an update every 13 months, and Retro Calc every 3 weeks. Most recently, Simple Calculator Multi was updated on October 25, 2026 and Retro Calc on October 28, 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.*