# Calculator83 vs RedoCalc

The clearest difference is ads: Calculator83 at none against RedoCalc's shown. Calculator83 also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18.0). RedoCalc's advantage is update cadence (every 3 days vs every 20 months). On price 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.

Calculator83 ships an update every 20 months, RedoCalc every 3 days. The most recent releases landed on October 14, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Calculator83 | RedoCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/calculator83/id891194491/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 20 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 10 MB | 3 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Lyker Labs LLC](https://appshunter.io/developer/891194494) | [Toshiyuki Kuwabara](https://appshunter.io/developer/1649322074) |

## What reviewers say

### Calculator83

[App page](https://appshunter.io/ios/app/calculator83/id891194491)

A minimalist calculator app focused on simplicity and a clean workflow. It offers both basic and scientific modes, allowing users to perform calculations without complex settings. Get started quickly with this straightforward tool.

**Highlights:** Minimalist design, Clean workflow, Basic mode, Scientific mode, Easy to use

**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 Calculator83 free?

Calculator83 is free to download, with no in-app purchases.

### Is RedoCalc free?

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

### Do Calculator83 or RedoCalc have ads?

RedoCalc shows ads; Calculator83 does not.

### Which is updated more often, Calculator83 or RedoCalc?

Calculator83 ships an update every 20 months, and RedoCalc every 3 days. Most recently, Calculator83 was updated on October 14, 2026 and RedoCalc on September 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.*