# Even or odd Mental calculation vs Sudoku Combinations

The clearest difference is in-app purchases: Sudoku Combinations at none against Even or odd Mental calculation's 1. Even or odd Mental calculation's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. Even or odd Mental calculation sells 1 one-off in-app purchase. Sudoku Combinations asks for nothing beyond the download.

## The numbers

| Metric | Even or odd Mental calculation | Sudoku Combinations |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | — |
| Update frequency | Every 23 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 68 MB | 1 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [Iker Vazquez](https://appshunter.io/developer/1032978250) | [anders oredsson](https://appshunter.io/developer/353392485) |

## What reviewers say

### Even or odd Mental calculation

[App page](https://appshunter.io/ios/app/even-or-odd-mental-calculation/id1032978251)

Test your mental math skills by quickly determining if the result of an on-screen operation is even or odd. Earn more points for faster answers and challenge friends to see who has the quickest mind. The difficulty increases as you progress.

**Highlights:** Timed mental calculation challenges, Score tracking for personal bests, Speed-based scoring system, Increasing difficulty levels, Multiplayer comparison

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version upgrade | $0.99 | one-time |


### Sudoku Combinations

[App page](https://appshunter.io/ios/app/sudoku-combinations/id6503015101)

**In-app purchases:** none


## Frequently asked questions

### Is Even or odd Mental calculation free?

Even or odd Mental calculation is free to download, with in-app purchases available.

### Is Sudoku Combinations free?

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

---

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