# PenFill vs BlankStudy

The clearest difference is price: PenFill at Free against BlankStudy's $1.99. PenFill also leads on update cadence (daily vs fortnightly). BlankStudy's advantage is in-app purchases (none vs 10) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

PenFill is free to download; BlankStudy costs $1.99 up front. PenFill sells 10 in-app purchases, starting at $4.99 per month. BlankStudy asks for nothing beyond the download.

PenFill ships an update daily, BlankStudy fortnightly. The most recent releases landed on October 11, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | PenFill | BlankStudy |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Daily** | Fortnightly |
| Size | 41 MB | 8 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Sho Handa](https://appshunter.io/developer/1895400851) | [SANGSANGLYEOG](https://appshunter.io/developer/6775833421) |

## What reviewers say

### 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 |


### BlankStudy

[App page](https://appshunter.io/ios/app/blankstudy-cloze-study/id6797284965)

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

**In-app purchases:** none


## Frequently asked questions

### Is PenFill free?

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

### Is BlankStudy free?

BlankStudy costs $1.99, with no in-app purchases.

### Do PenFill or BlankStudy have ads?

PenFill shows ads; BlankStudy does not.

### Which is updated more often, PenFill or BlankStudy?

PenFill ships an update daily, and BlankStudy fortnightly. Most recently, PenFill was updated on October 11, 2026 and BlankStudy on October 5, 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.*