# 記憶力道場 vs PIECE

The clearest difference is update cadence: PIECE at every 3 days against 記憶力道場's every 10 days. On price, ads, in-app purchases and device support there is nothing between them.

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

記憶力道場 ships an update every 10 days, PIECE every 3 days. The most recent releases landed on October 11, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 記憶力道場 | PIECE |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 3 days** |
| Size | 7 MB | 12 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SANWA Inc.](https://appshunter.io/developer/1878028373) | [Shuntaro Shimada](https://appshunter.io/developer/1851679432) |

## What reviewers say

### 記憶力道場

[App page](https://appshunter.io/ios/app/id6760859354)

**Features:** macOS Compatibility

**In-app purchases:** none


### PIECE

[App page](https://appshunter.io/ios/app/piece/id6796343521)

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

**In-app purchases:** none


## Frequently asked questions

### Is 記憶力道場 free?

記憶力道場 is free to download, with no in-app purchases.

### Is PIECE free?

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

### Do 記憶力道場 or PIECE have ads?

Neither 記憶力道場 nor PIECE shows ads.

### Which is updated more often, 記憶力道場 or PIECE?

記憶力道場 ships an update every 10 days, and PIECE every 3 days. Most recently, 記憶力道場 was updated on October 11, 2026 and PIECE 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.*