# RedoCalc vs DEDEDEN

The clearest difference is in-app purchases: RedoCalc at none against DEDEDEN's 1. RedoCalc also leads on update cadence (every 3 days vs every 3 weeks). DEDEDEN's advantage is iOS requirement (15.0 vs 18.0). On price, ads and device support there is nothing between them.

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

RedoCalc ships an update every 3 days, DEDEDEN every 3 weeks. The most recent releases landed on October 11, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | RedoCalc | DEDEDEN |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Size | 3 MB | 25 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Toshiyuki Kuwabara](https://appshunter.io/developer/1649322074) | [Tarinai Works](https://appshunter.io/developer/1857880583) |

## What reviewers say

### RedoCalc

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

**Features:** macOS Compatibility

**In-app purchases:** none


### DEDEDEN

[App page](https://appshunter.io/ios/app/dededen/id6757660599)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Feature Unlock | $1.99 | one-time |


## Frequently asked questions

### Is RedoCalc free?

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

### Is DEDEDEN free?

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

### Do RedoCalc or DEDEDEN have ads?

Both RedoCalc and DEDEDEN show ads.

### Which is updated more often, RedoCalc or DEDEDEN?

RedoCalc ships an update every 3 days, and DEDEDEN every 3 weeks. Most recently, RedoCalc was updated on October 11, 2026 and DEDEDEN on October 13, 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.*