# RedoCalc vs ParallelCalculator

The clearest difference is in-app purchases: RedoCalc at none against ParallelCalculator's 2. ParallelCalculator's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 18.0). On price and ads there is nothing between them.

Both are free to download. ParallelCalculator sells 2 in-app purchases, starting at $1.99 per month. RedoCalc asks for nothing beyond the download.

## The numbers

| Metric | RedoCalc | ParallelCalculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 days | — |
| Size | 3 MB | 38 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Toshiyuki Kuwabara](https://appshunter.io/developer/1649322074) | [Ryusei Wakita](https://appshunter.io/developer/1896649944) |

## What reviewers say

### RedoCalc

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

**Features:** macOS Compatibility

**In-app purchases:** none


### ParallelCalculator

[App page](https://appshunter.io/ios/app/parallelcalculator/id6769945397)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム 月額プラン | $1.99 | per month |
| プレミアム 年額プラン | $19.99 | per year |


## Frequently asked questions

### Is RedoCalc free?

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

### Is ParallelCalculator free?

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

### Do RedoCalc or ParallelCalculator have ads?

Both RedoCalc and ParallelCalculator show ads.

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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.*