# Quadrivium vs Odin's Drop 4+

The clearest difference is update cadence: Odin's Drop 4+ at every 3 weeks against Quadrivium's every 2 months. Odin's Drop 4+ also leads on price ($1.99 vs $3.99) and device support (4 vs 2). On ads, in-app purchases and iOS requirement there is nothing between them.

Quadrivium costs $3.99 and Odin's Drop 4+ $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Quadrivium ships an update every 2 months, Odin's Drop 4+ every 3 weeks. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Quadrivium | Odin's Drop 4+ |
| --- | --- | --- |
| Price | $3.99 | **$1.99** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 4 MB | 19 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac, Apple TV** |
| Age rating | +4 | 4+ |
| Developer | [Tobias Reithmeier](https://appshunter.io/developer/1882860698) | [HOLLENDER CONSULTING LLC](https://appshunter.io/developer/6792292860) |

## What reviewers say

### Quadrivium

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

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

**In-app purchases:** none


### Odin's Drop 4+

[App page](https://appshunter.io/ios/app/odins-drop-4-plus/id6818329668)

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

**In-app purchases:** none


## Frequently asked questions

### Is Quadrivium free?

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

### Is Odin's Drop 4+ free?

Odin's Drop 4+ costs $1.99, with no in-app purchases.

### Do Quadrivium or Odin's Drop 4+ have ads?

Neither Quadrivium nor Odin's Drop 4+ shows ads.

### Which is updated more often, Quadrivium or Odin's Drop 4+?

Quadrivium ships an update every 2 months, and Odin's Drop 4+ every 3 weeks. Most recently, Quadrivium was updated on October 31, 2026 and Odin's Drop 4+ on November 6, 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.*