# One Left vs MathifyK

The clearest difference is iOS requirement: MathifyK at 13.0 against One Left's 17.6. On price, ads, 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.

## The numbers

| Metric | One Left | MathifyK |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | — |
| Size | 14 MB | 43 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Alexandre Brotto Rangel da Silva](https://appshunter.io/developer/1868933438) | [Mohan Reddy](https://appshunter.io/developer/1870408863) |

## What reviewers say

### One Left

[App page](https://appshunter.io/ios/app/one-left-peg-solitaire/id6757789359)

**In-app purchases:** none


### MathifyK

[App page](https://appshunter.io/ios/app/mathifyk/id6760960726)

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

**In-app purchases:** none


## Frequently asked questions

### Is One Left free?

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

### Is MathifyK free?

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

### Do One Left or MathifyK have ads?

Neither One Left nor MathifyK shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*