# Study Vision AI 復習ノート vs PenFill

Study Vision AI 復習ノート and PenFill are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Study Vision AI 復習ノート sells 2 in-app purchases, starting at $12.99 per month and PenFill sells 10 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Study Vision AI 復習ノート ships an update every 2 days, PenFill daily. The most recent releases landed on October 8, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Study Vision AI 復習ノート | PenFill |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 days | **Daily** |
| Size | 6 MB | 41 MB |
| Requires iOS | 17.0 | **16.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [reiko hori](https://appshunter.io/developer/1777370692) | [Sho Handa](https://appshunter.io/developer/1895400851) |

## What reviewers say

### Study Vision AI 復習ノート

[App page](https://appshunter.io/ios/app/study-vision-ai/id6757267244)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Plan | $12.99 | per month |
| PREMIUMプラン | $24.99 | per month |


### PenFill

[App page](https://appshunter.io/ios/app/penfill/id6763618010)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 数学モード(月額) | $4.99 | per month |
| ライフ +20 | $0.99 | one-time |
| セーブ数 +3 | $2.99 | one-time |
| ライフ +50 | $2.99 | one-time |
| セーブ数 +7 | $5.99 | one-time |
| ライフ +100 | $5.99 | one-time |
| 広告削除 | $6.99 | one-time |
| ライフ +250 | $11.99 | one-time |
| プレミアムパック | $59.99 | one-time |
| コンプリートパック | $99.99 | one-time |


## Frequently asked questions

### Is Study Vision AI 復習ノート free?

Study Vision AI 復習ノート is free to download, with in-app purchases available.

### Is PenFill free?

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

### Do Study Vision AI 復習ノート or PenFill have ads?

Both Study Vision AI 復習ノート and PenFill show ads.

### Which is updated more often, Study Vision AI 復習ノート or PenFill?

Study Vision AI 復習ノート ships an update every 2 days, and PenFill daily. Most recently, Study Vision AI 復習ノート was updated on October 8, 2026 and PenFill on September 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*