BookPDF vs Yomu
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。
Yomu
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Yomu is a reader for iPhone and iPad built for heavy scanned and self-scanned PDFs. Convert self-scanned books, scanned handouts, and technical or class-material PDFs into .yom, a reading-optimized format, and page through them fast — a reader built to focus on reading. [Key Features] • Blazing-fast page rendering Smooth, stress-free reading even with heavy scanned PDFs and large documents. • Full-text search, even for scans Build an index and jump straight to matching pages. Image-only scanned PDFs are made searchable with on-device OCR. • Two-page spreads and reading direction Choose left-to-right or right-to-left, with full two-page spread support. • Comfortable reading adjustments Shadow reduction at page edges and color inversion for dark reading. • Everything runs on device Conversion, search, and reading all run on device — your content is never sent to a server. Read offline anytime. • Simple one-time purchase Add up to 2 books for free. Adding a 3rd requires a single one-time purchase — no subscription, no recurring charges. Terms of Use: https://yomu.juntaki.com/terms/ Privacy Policy: https://yomu.juntaki.com/privacy-policy/
Screenshots
Verdict
The clearest difference is in-app purchases: BookPDF at none against Yomu's 3. BookPDF also leads on update cadence (every 2 days vs every 4 months). On price, ads, device support and iOS requirement 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. Yomu sells 3 in-app purchases, starting at $3.99 per month. BookPDF asks for nothing beyond the download.
BookPDF ships an update every 2 days, Yomu every 4 months. The most recent releases landed on October 11, 2026 and October 22, 2026 respectively.
| Parameter | BookPDF | Yomu |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18 | 17.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuta Sugawara | Jumpei Takiyasu |
In-app purchases
BookPDF
No in-app purchases
Yomu
- Yomu Pro Monthly$3.991 Month
- Yomu Pro Yearly$29.991 Year
- Yomu Unlimited$9.99








