# Calculator with reverse screen vs Twin Calc

The clearest difference is in-app purchases: Calculator with reverse screen at none against Twin Calc's 1. Calculator with reverse screen also leads on device support (3 vs 1). Twin Calc's advantage is ads (none vs shown). On price and iOS requirement there is nothing between them.

Both are free to download. Twin Calc sells 1 one-off in-app purchase. Calculator with reverse screen asks for nothing beyond the download.

## The numbers

| Metric | Calculator with reverse screen | Twin Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | — |
| Size | 35 MB | 45 MB |
| Requires iOS | **15.8.3** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Hiroki Sugiyama](https://appshunter.io/developer/6778858327) |

## What reviewers say

### Calculator with reverse screen

[App page](https://appshunter.io/ios/app/calculator-with-reverse-screen/id6497792768)

**Features:** macOS Compatibility

**In-app purchases:** none


### Twin Calc

[App page](https://appshunter.io/ios/app/twin-calc-two-calculators/id6807615879)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO | $3.99 | one-time |


## Frequently asked questions

### Is Calculator with reverse screen free?

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

### Is Twin Calc free?

Twin Calc is free to download, with in-app purchases available.

### Do Calculator with reverse screen or Twin Calc have ads?

Calculator with reverse screen shows ads; Twin Calc does not.

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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.*