# Isotropy vs Eidetic Memory Championship

The clearest difference is in-app purchases: Eidetic Memory Championship at none against Isotropy's 1. Isotropy's advantage is review sentiment (100% vs 75%). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Isotropy sells 1 one-off in-app purchase. Eidetic Memory Championship asks for nothing beyond the download.

## The numbers

| Metric | Isotropy | Eidetic Memory Championship |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (18 ratings)](https://appshunter.io/ios/app/eidetic-memory-championship/id1169060360/reviews)** |
| Number of ratings | — | **18** |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 9 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 72 MB | 29 MB |
| Requires iOS | **6.0** | 7.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmitriy Prikhodko](https://appshunter.io/developer/558164332) | [Hideyuki Kawano](https://appshunter.io/developer/1169060359) |

## What reviewers say

### Isotropy

[App page](https://appshunter.io/ios/app/isotropy/id992819687)

A fast-paced puzzle game where players must quickly identify and tap the unique item among 100 identical ones within a strict time limit. Challenge yourself to find as many differences as possible in this addictive test of observation.

**Highlights:** Identify unique item, 10-second time limit, Fast-paced gameplay, Observation challenge, High replayability

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### Eidetic Memory Championship

[App page](https://appshunter.io/ios/app/eidetic-memory-championship/id1169060360)

This brain training game challenges you to memorize digits shown on screen as quickly as possible. It offers both a normal mode for practice and a difficult mode for advanced players. Improve your visual memory and unlock your potential through repeated play.

**Highlights:** Memorize digits on screen, Timed challenges, Normal training mode, Expert hard mode, Improve visual memory

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

**In-app purchases:** none


## Frequently asked questions

### Is Isotropy free?

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

### Is Eidetic Memory Championship free?

Eidetic Memory Championship is free to download, with no in-app purchases.

### Do Isotropy or Eidetic Memory Championship have ads?

Neither Isotropy nor Eidetic Memory Championship shows ads.

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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.*