# Tap Turn Block vs Erwin

The clearest difference is review sentiment: Tap Turn Block at 100% against Erwin's 0%. Tap Turn Block also leads on price (Free vs $4.99) and iOS requirement (16.0 vs 26.0). Erwin's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support there is nothing between them.

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

Tap Turn Block ships an update every 2 months, Erwin every 8 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Tap Turn Block | Erwin |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tap-turn-block/id6757365343/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 8 days** |
| Monetization | **Ad-supported** | Paid |
| Size | 178 MB | 43 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | +4 |
| Developer | [Taylor Simmons](https://appshunter.io/developer/1736783130) | [Tamas Bartal](https://appshunter.io/developer/896478676) |

## What reviewers say

### Tap Turn Block

[App page](https://appshunter.io/ios/app/tap-turn-block/id6757365343)

A one-tap arcade game where precise timing is key to survival. Navigate a constantly moving block through gaps and avoid obstacles with simple 90-degree turns. Master the controls to achieve high scores in this fast-paced, skill-based challenge.

**Highlights:** One-tap controls with 90° turns, Skill-based arcade gameplay, Forgiving first hit shield, Smooth animations and effects, Retro-inspired visuals, Endless score-chasing challenge

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hearts Shield Skin | $4.99 | one-time |
| Lightning Shield Skin | $4.99 | one-time |


### 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


## Frequently asked questions

### Is Tap Turn Block free?

Tap Turn Block is free to download, with in-app purchases available.

### Is Erwin free?

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

### Do Tap Turn Block or Erwin have ads?

Tap Turn Block shows ads; Erwin does not.

### Which is updated more often, Tap Turn Block or Erwin?

Tap Turn Block ships an update every 2 months, and Erwin every 8 days. Most recently, Tap Turn Block was updated on November 5, 2026 and Erwin on October 31, 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.*