# Key Calculator vs Calculator+ Simple Math

Key Calculator and Calculator+ Simple Math are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | Key Calculator | Calculator+ Simple Math |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 27 MB | 19 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [瑞勤 李](https://appshunter.io/developer/1401713785) | [Space 64 LLC](https://appshunter.io/developer/1769185943) |

## What reviewers say

### Key Calculator

[App page](https://appshunter.io/ios/app/key-calculator/id6740821637)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calculator+ Simple Math

[App page](https://appshunter.io/ios/app/calculator-plus-simple-math/id6764523918)

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

**In-app purchases:** none


## Frequently asked questions

### Is Key Calculator free?

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

### Is Calculator+ Simple Math free?

Calculator+ Simple Math is free to download, with no in-app purchases.

### Do Key Calculator or Calculator+ Simple Math have ads?

Neither Key Calculator nor Calculator+ Simple Math shows 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.*