BookPDF vs Wunder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BookPDF
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このアプリは、PDFを“本のように”快適に読むためのシンプルなリーダーです。 右から左へのページめくり表示に対応し、読書の流れを邪魔しない設計にしてあります。 主な機能 ・右から左へ進むページめくり（読書向け表示） ・しおり（現在ページをワンタップで登録/解除） ・しおり一覧からページへジャンプ ・続きから再開（前回の読書位置を保存） ・PDFの取り込みとライブラリ管理（名前変更・削除） こんな人におすすめ ・PDF小説や資料を“読むために”使いたい ・余計な機能より、見やすさと操作の迷いの少なさを重視したい ※本アプリは、ユーザーが用意したPDFファイルを端末内で閲覧するためのアプリです。
Wunder
Organize your personal library of EPUB, TXT, and PDF files on a virtual bookshelf. Enjoy reading with annotation tools or listen to your books with read-aloud playback. Save and share highlighted passages as note cards.
- 3D virtual bookshelf organization
- EPUB, TXT, PDF file support
- Read-aloud playback
- Highlighting and annotation
- Note card creation from excerpts
- Bookmark management
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Wunder is an eBook reader for your own PDF, EPUB, and TXT files. Import your books into a quiet bookshelf and read on iPhone and iPad, or use read-aloud playback when you want to rest your eyes. Add bookmarks, highlight, underline, annotate, and collect excerpts as you read. Turn selected passages into shareable note cards, while your bookshelf, reading progress, and notes stay organized on your device. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://app.notion.com/p/Wunder-Privacy-Policy-36b9645c47b680179361c6bb3be81b07
Screenshots
Verdict
The clearest difference is iOS requirement: Wunder at 16.0 against BookPDF's 18. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 2 days. Both last shipped on October 11, 2026.
| Parameter | BookPDF | Wunder |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Every 2 days | Every 2 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18 | 16.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 324 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuta Sugawara | 国城 林 |
In-app purchases
BookPDF
No in-app purchases
Wunder
No in-app purchases
