# Chemyst vs Four Memory

The clearest difference is price: Chemyst at Free against Four Memory's $0.99. Four Memory's advantage is review sentiment (100% vs 70%) and update cadence (every 5 days vs every 3 weeks). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Chemyst is free to download; Four Memory costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Chemyst ships an update every 3 weeks, Four Memory every 5 days. The most recent releases landed on October 24, 2026 and June 10, 2026 respectively.

## The numbers

| Metric | Chemyst | Four Memory |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.2 (131 ratings)](https://appshunter.io/ios/app/chemyst/id1477871260/reviews)** | — |
| Number of ratings | **131** | — |
| Positive reviews | 70.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | **Free** | Paid |
| Size | 105 MB | 233 MB |
| Requires iOS | **8.0** | 9.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Medeiros](https://appshunter.io/developer/1091004600) | [Dreamstate Studios](https://appshunter.io/developer/1360612296) |

## What reviewers say

### Chemyst

[App page](https://appshunter.io/ios/app/chemyst/id1477871260)

Experiment with basic elements to discover new compounds and molecules. Mix up to four elements, observe reactions, and unlock new discoveries. Hints are provided for non-reactive mixtures, and information about discovered elements is available.

**Highlights:** Mix up to four elements, Discover new compounds and molecules, Unlock new elements, View element information and Wikipedia pages, Receive hints for reactions, Leaderboards and achievements

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

**In-app purchases:** none


### Four Memory

[App page](https://appshunter.io/ios/app/four-memory/id1540217692)

This game offers an infinite memory training experience with four distinct difficulty levels. Players must recall and tap characters in the correct sequence as they appear. It's designed to be engaging for both children and adults.

**Highlights:** Infinite memory training, Four difficulty levels, Character sequence recall, Engaging for all ages, Simple tap controls

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chemyst free?

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

### Is Four Memory free?

Four Memory costs $0.99, with no in-app purchases.

### Do Chemyst or Four Memory have ads?

Neither Chemyst nor Four Memory shows ads.

### Which is updated more often, Chemyst or Four Memory?

Chemyst ships an update every 3 weeks, and Four Memory every 5 days. Most recently, Chemyst was updated on October 24, 2026 and Four Memory on June 10, 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.*