# マッピングメモリアル vs Chum

The clearest difference is update cadence: マッピングメモリアル at every 5 days against Chum's every 2 months. マッピングメモリアル also leads on device support (3 vs 1) and iOS requirement (12.0 vs 18.5). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

マッピングメモリアル ships an update every 5 days, Chum every 2 months. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | マッピングメモリアル | Chum |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 2 months |
| Size | 41 MB | 20 MB |
| Requires iOS | **12.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KnotNest](https://appshunter.io/developer/1813321541) | [Kota Sakurai](https://appshunter.io/developer/1523595704) |

## What reviewers say

### マッピングメモリアル

[App page](https://appshunter.io/ios/app/id6746159780)

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

**In-app purchases:** none


### Chum

[App page](https://appshunter.io/ios/app/chum/id6748934376)

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

**In-app purchases:** none


## Frequently asked questions

### Is マッピングメモリアル free?

マッピングメモリアル is free to download, with no in-app purchases.

### Is Chum free?

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

### Do マッピングメモリアル or Chum have ads?

Neither マッピングメモリアル nor Chum shows ads.

### Which is updated more often, マッピングメモリアル or Chum?

マッピングメモリアル ships an update every 5 days, and Chum every 2 months. Most recently, マッピングメモリアル was updated on October 10, 2026 and Chum on October 12, 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.*