# Erwin vs VoiceGammon

The clearest difference is update cadence: VoiceGammon at every 4 days against Erwin's every 8 days. VoiceGammon also leads on price ($2.99 vs $4.99) and iOS requirement (17.6 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

Erwin costs $4.99 and VoiceGammon $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Erwin ships an update every 8 days, VoiceGammon every 4 days. Both last shipped on October 20, 2026.

## The numbers

| Metric | Erwin | VoiceGammon |
| --- | --- | --- |
| Price | $4.99 | **$2.99** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 4 days** |
| Monetization | Paid | — |
| Size | 43 MB | 6 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tamas Bartal](https://appshunter.io/developer/896478676) | [Stelios Platsis](https://appshunter.io/developer/667955338) |

## 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


### VoiceGammon

[App page](https://appshunter.io/ios/app/voicegammon/id6802428685)

**In-app purchases:** none


## Frequently asked questions

### Is Erwin free?

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

### Is VoiceGammon free?

VoiceGammon costs $2.99, with no in-app purchases.

### Do Erwin or VoiceGammon have ads?

Neither Erwin nor VoiceGammon shows ads.

### Which is updated more often, Erwin or VoiceGammon?

Erwin ships an update every 8 days, and VoiceGammon every 4 days. Most recently, Erwin was updated on October 20, 2026 and VoiceGammon on October 20, 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.*