# PenFlow vs Japanese Kanji Study

The clearest difference is in-app purchases: PenFlow at none against Japanese Kanji Study's 1. PenFlow also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Japanese Kanji Study sells 1 one-off in-app purchase. PenFlow asks for nothing beyond the download.

PenFlow ships an update every 10 days, Japanese Kanji Study weekly. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | PenFlow | Japanese Kanji Study |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Weekly** |
| Size | 5 MB | 10 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SANWA Inc.](https://appshunter.io/developer/1878028373) | [Kinicy](https://appshunter.io/developer/366096366) |

## What reviewers say

### PenFlow

[App page](https://appshunter.io/ios/app/penflow/id6761091973)

**Features:** macOS Compatibility

**In-app purchases:** none


### Japanese Kanji Study

[App page](https://appshunter.io/ios/app/japanese-kanji-study/id6785224365)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro（すべての がくねん） | $2.99 | one-time |


## Frequently asked questions

### Is PenFlow free?

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

### Is Japanese Kanji Study free?

Japanese Kanji Study is free to download, with in-app purchases available.

### Do PenFlow or Japanese Kanji Study have ads?

Japanese Kanji Study shows ads; PenFlow does not.

### Which is updated more often, PenFlow or Japanese Kanji Study?

PenFlow ships an update every 10 days, and Japanese Kanji Study weekly. Most recently, PenFlow was updated on October 25, 2026 and Japanese Kanji Study on October 28, 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.*