# ChemicalMemoryGame vs RoomEight

The clearest difference is in-app purchases: ChemicalMemoryGame at none against RoomEight's 6. ChemicalMemoryGame also leads on iOS requirement (15.0 vs 26.1). RoomEight's advantage is update cadence (fortnightly vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. RoomEight sells 6 one-off in-app purchases. ChemicalMemoryGame asks for nothing beyond the download.

ChemicalMemoryGame ships an update monthly, RoomEight fortnightly. The most recent releases landed on October 17, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | ChemicalMemoryGame | RoomEight |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Fortnightly** |
| Size | 297 MB | 1.2 GB |
| Requires iOS | **15.0** | 26.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [soichiro totoki](https://appshunter.io/developer/1755863943) | [Kawamata Koichiro](https://appshunter.io/developer/788575817) |

## What reviewers say

### ChemicalMemoryGame

[App page](https://appshunter.io/ios/app/chemicalmemorygame/id6743126799)

**Features:** macOS Compatibility

**In-app purchases:** none


### RoomEight

[App page](https://appshunter.io/ios/app/roomeight/id6757898977)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Stage | $0.99 | one-time |
| Secret Book | $0.99 | one-time |
| Rewind Watch (Gold) | $0.99 | one-time |
| Secret Book x5 | $3.99 | one-time |
| Rewind Watch (Gold) x5 | $3.99 | one-time |
| Remove Ads | $29.99 | one-time |


## Frequently asked questions

### Is ChemicalMemoryGame free?

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

### Is RoomEight free?

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

### Do ChemicalMemoryGame or RoomEight have ads?

Both ChemicalMemoryGame and RoomEight show ads.

### Which is updated more often, ChemicalMemoryGame or RoomEight?

ChemicalMemoryGame ships an update monthly, and RoomEight fortnightly. Most recently, ChemicalMemoryGame was updated on October 17, 2026 and RoomEight on October 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.*