# Think vs Sudoku by Skillkeep

The clearest difference is update cadence: Think at every 2 days against Sudoku by Skillkeep's monthly. 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.

Think ships an update every 2 days, Sudoku by Skillkeep monthly. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Think | Sudoku by Skillkeep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Monthly |
| Size | 86 MB | 19 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [AssetsTech-FZCO](https://appshunter.io/developer/1760299349) | [Bitsational](https://appshunter.io/developer/1771805404) |

## What reviewers say

### Think

[App page](https://appshunter.io/ios/app/think-sharp/id6736652958)

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

**In-app purchases:** none


### Sudoku by Skillkeep

[App page](https://appshunter.io/ios/app/sudoku-by-skillkeep/id6757141424)

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

**In-app purchases:** none


## Frequently asked questions

### Is Think free?

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

### Is Sudoku by Skillkeep free?

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

### Do Think or Sudoku by Skillkeep have ads?

Neither Think nor Sudoku by Skillkeep shows ads.

### Which is updated more often, Think or Sudoku by Skillkeep?

Think ships an update every 2 days, and Sudoku by Skillkeep monthly. Most recently, Think was updated on October 27, 2026 and Sudoku by Skillkeep on October 25, 2026.

---

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