# RedoCalc vs Chain Calculator

The clearest difference is ads: Chain Calculator at none against RedoCalc's shown. Chain Calculator also leads on iOS requirement (13.0 vs 18.0). RedoCalc's advantage is update cadence (every 3 days vs monthly). On price, in-app purchases and device support there is nothing between them.

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

RedoCalc ships an update every 3 days, Chain Calculator monthly. The most recent releases landed on October 11, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | RedoCalc | Chain Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Monthly |
| Size | 3 MB | 18 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Toshiyuki Kuwabara](https://appshunter.io/developer/1649322074) | [seongkuk park](https://appshunter.io/developer/1895828986) |

## What reviewers say

### RedoCalc

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Chain Calculator

[App page](https://appshunter.io/ios/app/chain-calculator/id6764549705)

**In-app purchases:** none


## Frequently asked questions

### Is RedoCalc free?

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

### Is Chain Calculator free?

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

### Do RedoCalc or Chain Calculator have ads?

RedoCalc shows ads; Chain Calculator does not.

### Which is updated more often, RedoCalc or Chain Calculator?

RedoCalc ships an update every 3 days, and Chain Calculator monthly. Most recently, RedoCalc was updated on October 11, 2026 and Chain Calculator on October 6, 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.*