# AcChen vs EigenGauge

The clearest difference is price: EigenGauge at Free against AcChen's $0.99. EigenGauge also leads on rating (3.8 vs 3.3) and update cadence (every 6 weeks vs every 38 months). AcChen's advantage is in-app purchases (none vs 3) and review sentiment (64% vs 55%). On ads and device support there is nothing between them.

EigenGauge is free to download; AcChen costs $0.99 up front. EigenGauge sells 3 one-off in-app purchases. AcChen asks for nothing beyond the download.

EigenGauge holds the better App Store score, 3.8 against 3.3. Both are backed by a comparable volume of ratings — 7 and 32 respectively. Written reviews complicate that: 64% of AcChen's written reviews are positive against 55% of EigenGauge's, so the app with the better star average is not the one people write more warmly about.

AcChen ships an update every 38 months, EigenGauge every 6 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | AcChen | EigenGauge |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.3 (7 ratings)](https://appshunter.io/ios/app/acchen-solitaire-tiles-game/id389979774/reviews) | **[3.8 (32 ratings)](https://appshunter.io/ios/app/eigengauge/id1533879018/reviews)** |
| Number of ratings | 7 | **32** |
| Positive reviews | **63.6% of reviews** | 55.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 6 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 37 MB | 975 MB |
| Requires iOS | 15.6 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stefan Preuss](https://appshunter.io/developer/307563428) | [CHRIS HODGE](https://appshunter.io/developer/903916651) |

## What reviewers say

### AcChen

[App page](https://appshunter.io/ios/app/acchen-solitaire-tiles-game/id389979774)

This arcade-style tile-matching game challenges players to find pairs of identical symbols. It features a single-player campaign with multiple levels and bonus maps, as well as a local multiplayer mode for competing with a friend. Special items and layered tiles add strategic depth to the gameplay.

**Highlights:** Arcade-style tile matching, Single-player campaign, Local multiplayer mode, 60+ levels and bonus maps, Multitouch support, Global high score list, Unlockable achievements

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

**In-app purchases:** none


### EigenGauge

[App page](https://appshunter.io/ios/app/eigengauge/id1533879018)

Experience intense, retro-style racing across a star system with numerous locations. Master diverse abilities and choose from six unique vehicles. Compete in challenging races to unlock new content.

**Highlights:** Retro high-speed racing, Star system exploration, Unlockable abilities, Six distinct vehicles, Unlock new challenges

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 200 Gems | $0.99 | one-time |
| 500 Gems | $1.99 | one-time |
| 900 Gems | $2.99 | one-time |


## Frequently asked questions

### Is AcChen free?

AcChen costs $0.99, with no in-app purchases.

### Is EigenGauge free?

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

### Which has better reviews, AcChen or EigenGauge?

EigenGauge is rated higher. AcChen averages 3.3 out of 5 from 7 ratings, while EigenGauge averages 3.8 from 32 ratings.

### Do AcChen or EigenGauge have ads?

Neither AcChen nor EigenGauge shows ads.

### Which is updated more often, AcChen or EigenGauge?

AcChen ships an update every 38 months, and EigenGauge every 6 weeks. Most recently, AcChen was updated on October 23, 2026 and EigenGauge on October 24, 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.*