# AI Concentration vs ASTRO

The clearest difference is in-app purchases: AI Concentration at none against ASTRO's 1. AI Concentration also leads on iOS requirement (12.0 vs 18.0). ASTRO's advantage is update cadence (every 5 days vs every 7 months). On price, ads and device support there is nothing between them.

Both are free to download. ASTRO sells 1 one-off in-app purchase. AI Concentration asks for nothing beyond the download.

AI Concentration ships an update every 7 months, ASTRO every 5 days. The most recent releases landed on October 11, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | AI Concentration | ASTRO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ai-concentration/id6444780287/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 7 months | **Every 5 days** |
| Monetization | Ad-supported | — |
| Size | 96 MB | 92 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | +9 | 4+ |
| Developer | [Tahito Aoki](https://appshunter.io/developer/289946976) | [SHINTARO NAKAOKA](https://appshunter.io/developer/1020027439) |

## What reviewers say

### AI Concentration

[App page](https://appshunter.io/ios/app/ai-concentration/id6444780287)

Engage in a unique matching game using AI-generated images. Instead of identical pairs, match illustrations based on shared themes. Success requires memorization and understanding the AI's creative interpretations.

**Highlights:** AI-generated illustrations, Theme-based matching, Illustration collection, 16 unique themes, 80 total illustrations

**Features:** Vision Pro support

**In-app purchases:** none


### ASTRO

[App page](https://appshunter.io/ios/app/astro-boost/id6761886332)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads & Unlimited Stamina | $1.99 | one-time |


## Frequently asked questions

### Is AI Concentration free?

AI Concentration is free to download, with no in-app purchases.

### Is ASTRO free?

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

### Do AI Concentration or ASTRO have ads?

Both AI Concentration and ASTRO show ads.

### Which is updated more often, AI Concentration or ASTRO?

AI Concentration ships an update every 7 months, and ASTRO every 5 days. Most recently, AI Concentration was updated on October 11, 2026 and ASTRO on October 14, 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.*