# RedoCalc vs Twin Calc

The clearest difference is in-app purchases: RedoCalc at none against Twin Calc's 1. Twin Calc's advantage is ads (none vs shown) and iOS requirement (16.4 vs 18.0). On price and device support there is nothing between them.

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

## The numbers

| Metric | RedoCalc | Twin Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 days | — |
| Size | 3 MB | 45 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Toshiyuki Kuwabara](https://appshunter.io/developer/1649322074) | [Hiroki Sugiyama](https://appshunter.io/developer/6778858327) |

## What reviewers say

### RedoCalc

[App page](https://appshunter.io/ios/app/redocalc/id6743318834)

**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 RedoCalc free?

RedoCalc 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 RedoCalc or Twin Calc have ads?

RedoCalc 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.*