# PASSCODES vs 短期記憶強化

The clearest difference is ads: 短期記憶強化 at none against PASSCODES's shown. 短期記憶強化 also leads on update cadence (every 3 days vs every 2 months) and iOS requirement (15.1 vs 17.0). On price, 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.

PASSCODES ships an update every 2 months, 短期記憶強化 every 3 days. The most recent releases landed on May 17, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | PASSCODES | 短期記憶強化 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 days** |
| Size | 16 MB | 21 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KENICHI YAMAMOTO](https://appshunter.io/developer/1335325739) | [Katsushi Kuroki](https://appshunter.io/developer/1644390976) |

## What reviewers say

### PASSCODES

[App page](https://appshunter.io/ios/app/passcodes/id6737499782)

**Features:** macOS Compatibility

**In-app purchases:** none


### 短期記憶強化

[App page](https://appshunter.io/ios/app/id6738608229)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PASSCODES free?

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

### Is 短期記憶強化 free?

短期記憶強化 is free to download, with no in-app purchases.

### Do PASSCODES or 短期記憶強化 have ads?

PASSCODES shows ads; 短期記憶強化 does not.

### Which is updated more often, PASSCODES or 短期記憶強化?

PASSCODES ships an update every 2 months, and 短期記憶強化 every 3 days. Most recently, PASSCODES was updated on May 17, 2026 and 短期記憶強化 on September 9, 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.*