# Erwin vs Nook Sort

The clearest difference is price: Nook Sort at Free against Erwin's $4.99. Nook Sort also leads on iOS requirement (17.0 vs 26.0). Erwin's advantage is in-app purchases (none vs 2) and ads (none vs shown). On update cadence and device support there is nothing between them.

Nook Sort is free to download; Erwin costs $4.99 up front. Nook Sort sells 2 one-off in-app purchases. Erwin asks for nothing beyond the download.

Erwin ships an update every 8 days, Nook Sort weekly. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Erwin | Nook Sort |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 days | **Weekly** |
| Monetization | Paid | — |
| Size | 43 MB | 5 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tamas Bartal](https://appshunter.io/developer/896478676) | [VITALII HUK](https://appshunter.io/developer/1869515652) |

## What reviewers say

### Erwin

[App page](https://appshunter.io/ios/app/erwin-a-quantum-puzzle/id6761667185)

Experience a unique 3D sliding puzzle on a cube's six faces. Merge tiles, rotate the cube, and discover quantum effects like superposition and entanglement. Play with friends in multiplayer mode.

**Highlights:** 3D cube sliding puzzle, Tile merging and scoring, Quantum effects (superposition, entanglement), Cube rotation for multiple faces, Local multiplayer via Game Center, Universal app purchase

**Features:** Game Controller support, Vision Pro support

**In-app purchases:** none


### Nook Sort

[App page](https://appshunter.io/ios/app/nook-sort/id6801847990)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Pack | $2.99 | one-time |
| No Ads | $4.99 | one-time |


## Frequently asked questions

### Is Erwin free?

Erwin costs $4.99, with no in-app purchases.

### Is Nook Sort free?

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

### Do Erwin or Nook Sort have ads?

Nook Sort shows ads; Erwin does not.

### Which is updated more often, Erwin or Nook Sort?

Erwin ships an update every 8 days, and Nook Sort weekly. Most recently, Erwin was updated on October 24, 2026 and Nook Sort 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.*