# LineaLogic vs Quadrivium

The clearest difference is price: LineaLogic at Free against Quadrivium's $3.99. LineaLogic also leads on update cadence (every 8 days vs every 2 months). Quadrivium's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

LineaLogic is free to download; Quadrivium costs $3.99 up front. LineaLogic sells 1 one-off in-app purchase. Quadrivium asks for nothing beyond the download.

LineaLogic ships an update every 8 days, Quadrivium every 2 months. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | LineaLogic | Quadrivium |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 2 months |
| Size | 3 MB | 4 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | +4 |
| Developer | [michael dardol](https://appshunter.io/developer/478875188) | [Tobias Reithmeier](https://appshunter.io/developer/1882860698) |

## What reviewers say

### LineaLogic

[App page](https://appshunter.io/ios/app/linealogic-logic-puzzle/id6786031407)

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlocks all main levels | $4.99 | one-time |


### Quadrivium

[App page](https://appshunter.io/ios/app/quadrivium-logic-squares/id6799608995)

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

**In-app purchases:** none


## Frequently asked questions

### Is LineaLogic free?

LineaLogic is free to download, with in-app purchases available.

### Is Quadrivium free?

Quadrivium costs $3.99, with no in-app purchases.

### Do LineaLogic or Quadrivium have ads?

Neither LineaLogic nor Quadrivium shows ads.

### Which is updated more often, LineaLogic or Quadrivium?

LineaLogic ships an update every 8 days, and Quadrivium every 2 months. Most recently, LineaLogic was updated on October 28, 2026 and Quadrivium on October 29, 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.*