# 忘却曲線 vs Rewise

The clearest difference is in-app purchases: 忘却曲線 at none against Rewise's 4. 忘却曲線 also leads on update cadence (every 5 days vs every 4 weeks) and iOS requirement (15.5 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Rewise sells 4 in-app purchases, starting at $1.99 per 7 days. 忘却曲線 asks for nothing beyond the download.

忘却曲線 ships an update every 5 days, Rewise every 4 weeks. Both last shipped on November 6, 2026.

## The numbers

| Metric | 忘却曲線 | Rewise |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 4 weeks |
| Size | 94 MB | 8 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mitsuo Watabe](https://appshunter.io/developer/6788107915) | [REVOT, K.K.](https://appshunter.io/developer/1257719756) |

## What reviewers say

### 忘却曲線

[App page](https://appshunter.io/ios/app/id6799765993)

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

**In-app purchases:** none


### Rewise

[App page](https://appshunter.io/ios/app/rewise-flashcards-and-memory/id6802805295)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support, iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rewise Pro Weekly | $1.99 | per 7 days |
| Rewise Pro Monthly | $5.99 | per month |
| Rewise Pro Yearly | $29.99 | per year |
| Rewise Pro Lifetime | $69.99 | one-time |


## Frequently asked questions

### Is 忘却曲線 free?

忘却曲線 is free to download, with no in-app purchases.

### Is Rewise free?

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

### Do 忘却曲線 or Rewise have ads?

Neither 忘却曲線 nor Rewise shows ads.

### Which is updated more often, 忘却曲線 or Rewise?

忘却曲線 ships an update every 5 days, and Rewise every 4 weeks. Most recently, 忘却曲線 was updated on November 6, 2026 and Rewise on November 6, 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.*