# Furigana PDF — Add Furigana to PDF Documents

> Add furigana reading aids to Japanese PDF documents offline. (iPhone/iPad app by telethon k.k..)

- Source: https://appshunter.io/ios/app/furigana-pdf/id1516570722 (this page in markdown: same URL + `.md`)
- Developer: [telethon k.k.](https://appshunter.io/developer/699508003)
- Category: Utilities, Graphics & Design
- Price: Free
- Rating: 4.00/5 from 2 App Store ratings · 13 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.6 · 56 MB
- Languages: American English, German (Germany), Japanese
- Released: 2020-06-14
- Data updated: 2026-08-16
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/furigana-pdf/id1516570722/reviews.md

## What is Furigana PDF?

Struggling to read Japanese texts?
Furigana PDF has you covered. Open any Japanese language PDF and Furigana PDF will automatically add furigana reading aids (ruby) to all Kanji characters. You can customize furigana display to match the layout of your existing PDF to create beautiful documents.

You can also scan existing paper documents with your camera and add furigana.

Naturally, furigana-annotated PDFs can be exported and opened in other applications or ebook readers.

We respect your privacy. Furigana annotation works entirely offline and no data ever leaves your device. You can easily organize your PDFs in the Files app. No internet connection, account, or login required.

Furigana PDF supports both horizontal and vertical text. 

Please note that in rare cases furigana display may fail if crucial layout information is absent from the source PDF.

## Key features

- Automatic furigana annotation
- Customizable furigana display
- Scan and annotate paper documents
- Offline processing for privacy
- Supports horizontal and vertical text
- Export annotated PDFs

## Recent user reviews (10 of 13)

All indexed reviews: https://appshunter.io/ios/app/furigana-pdf/id1516570722/reviews.md

### 4/5 — 修正or部分的に選ぶ機能が欲しい

*2026-04-25*

間違ったルビなどが修正できる機能があればとっても助かります...！
あとやっぱり全てにルビを振ってしまうと画面の情報量が多いため、選択した部分だけルビを振る...などあればとても良いなと思いました...！

### 2/5 — フリガナの大きさと位置が・・・

*2026-03-09*

以前は大丈夫だったのですが、今はフリガナの大きさや色を変更すると、フリガナの大きさや位置がメチャクチャになることがあります。

### 3/5 — 惜しい！

*2025-10-22*

なかなかの精度でルビをふってくれます！
が、間違った読みのルビや重なりを簡単に直せる機能ようにして欲しいです！

### 4/5 — Peak Function

*2025-07-09*

This app is incredible. No where else can take a PDF and add Furigana to it, they all want to take pictures but that’s just so dysfunctional. This app has an almost 100% success rate in accurate pronunciation. Names of course are hard, and sometimes kanji has multiple ways to pronounce it based on context. Four stars because the traditional writing format of top to bottom right to left has much more difficulty in adding Furigana.

### 4/5 — iOS18.5ではひらがな表示できなくなりました

*2025-06-14*

お気に入りなので、是非正常に動作するようにご対応をお願いします。

### 4/5 — Very helpful and easy to use

*2024-01-21*

For me that I’m foreigner and have some difficulties to write and read specially “kanji “ is very helpful. It’s so simple and easy to use that I didn’t understand what was happening at the first. Very good app.

### 5/5 — Great App for Learners

*2023-12-18*

I use the app normally for reading light novels in tatekaki. It works really well and is customisable! There are a few mistakes but less than most other automated furigana output out there. However, the tatekaki file furiganas started not being in tatekaki, hovering over the text, and there seem to be so way of changing that... It's been like this for quite a bit now... It would be great if this could be fixed.

### 5/5 — いい

*2023-10-24*

ありがとう

### 3/5 — 縦書きに対応して欲しい！！！

*2023-10-05*

横書きの文章にふりがなを振る際、活用させていただいております。

ただ、縦書きだと、それぞれの文字上に横にふりがなが振られてしまうので、
右に縦書きでふりがなが振れるようになることを切実に祈っております。

### 5/5 — ふりがなの色は多様な選択

*2022-06-07*

もしかしたらふりがなのフォントの色が他の色を選べることができるといいですね

## Frequently asked questions about Furigana PDF

### Does Furigana PDF have ads?

No, Furigana PDF does not contain advertisements. The app is completely free to use without any ad interruptions.

### What devices does Furigana PDF support?

Furigana PDF is available on Mac, iPhone, and iPad, allowing users to annotate Japanese PDFs across multiple Apple devices.

### How often is Furigana PDF updated?

The latest version of Furigana PDF is 1.2.5, last updated on September 15, 2025. Updates are provided to improve functionality and address any issues.

### What is the age rating for Furigana PDF?

Furigana PDF has an age rating of 4+, making it suitable for a wide range of users, including younger learners.

### Can I use Furigana PDF offline?

Yes, Furigana PDF works entirely offline. All annotation processing is done on your device, ensuring your privacy and eliminating the need for an internet connection.

### What languages does Furigana PDF support?

Furigana PDF is specifically designed for reading Japanese texts. It automatically adds furigana to Kanji characters within PDF documents.

### What happens if furigana display fails in Furigana PDF?

In rare cases, furigana display may fail if crucial layout information is absent from the source PDF. This is a limitation based on the PDF's structure.

### How does Furigana PDF handle user privacy?

Furigana PDF respects user privacy by processing all annotations offline. No data ever leaves your device, and no internet connection or account login is required.

## Version history (last 5 releases)

### 1.2.5 — 2025-09-15

- iOS26 compatibility

### 1.2.4 — 2024-09-23

- iOS18 compatibility

### 1.2.2 — 2023-10-05

- editing furigana properly works again in iOS17

### 1.2.1 — 2023-09-20

- compatibility with iOS17

### 1.2.0 — 2022-09-12

- improved OCR performance
- bug fixes and performance improvements

## Apps similar to Furigana PDF

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Ai 绘画-设计师助手](https://appshunter.io/ios/app/ai/id6447472220) | 4.0 (2) | Free | Utilities |
| [启屋](https://appshunter.io/ios/app/id1592057660) | — | Free | Utilities |
| [La bàn vệ tinh](https://appshunter.io/ios/app/la-ban-ve-tinh/id1615881260) | — | Free | Utilities |
| [Transparent Note - Memo App](https://appshunter.io/ios/app/transparent-note-memo-app/id1619771580) | — | Free | Utilities |
| [逗逗拯救世界](https://appshunter.io/ios/app/id1621941520) | — | Free | Utilities |
| [Draw on Pictures - Simple](https://appshunter.io/ios/app/draw-on-pictures-simple/id1623365600) | 3.0 (2) | Free | Utilities |

## More apps by telethon k.k.

- [MySequence](https://appshunter.io/ios/app/mysequence/id699508000)
- [MyGels](https://appshunter.io/ios/app/mygels/id891708953)
- [Simple Furigana](https://appshunter.io/ios/app/simple-furigana/id924351286)
- [かけるかな？](https://appshunter.io/ios/app/id950138212)
- [Kanji Lookup](https://appshunter.io/ios/app/kanji-lookup/id973780102)
- [Let's Write Kanji!](https://appshunter.io/ios/app/lets-write-kanji/id983099156)

All apps by telethon k.k.: https://appshunter.io/developer/699508003

## Related topics

[pocket prep ncmhce](https://appshunter.io/ios/topics/pocket-prep-ncmhce)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-16.*