# 電卓　水色 vs RedoCalc

The clearest difference is update cadence: RedoCalc at every 3 days against 電卓　水色's every 23 months. 電卓　水色's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

電卓　水色 ships an update every 23 months, RedoCalc every 3 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 電卓　水色 | RedoCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 23 months | **Every 3 days** |
| Size | 19 MB | 3 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [kota tada](https://appshunter.io/developer/1658942612) | [Toshiyuki Kuwabara](https://appshunter.io/developer/1649322074) |

## What reviewers say

### 電卓　水色

[App page](https://appshunter.io/ios/app/id1658942610)

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

**In-app purchases:** none


### RedoCalc

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 電卓　水色 free?

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

### Is RedoCalc free?

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

### Do 電卓　水色 or RedoCalc have ads?

Both 電卓　水色 and RedoCalc show ads.

### Which is updated more often, 電卓　水色 or RedoCalc?

電卓　水色 ships an update every 23 months, and RedoCalc every 3 days. Most recently, 電卓　水色 was updated on October 24, 2026 and RedoCalc on October 25, 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.*