BookPDF vs Offline PDF Viewer
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。
Offline PDF Viewer
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Offline PDF Viewer is an app for reading PDF files transferred to your iPad or iPhone. Its main feature is the ability to browse folders transferred through Finder or iTunes File Sharing while preserving their original folder hierarchy. This app may suit you if: - You have a large collection of scanned PDF files - You want to transfer PDFs to your iPad while keeping the same folder structure as on your Mac or PC - Your PDF collection is too large for cloud synchronization, and you prefer to manage it entirely on your device This app focuses on reading PDFs. It does not include editing, annotation, or some other features commonly found in general-purpose PDF viewers. Please review the following list of supported and unsupported features before using the app. ■ Features - Browse folders transferred through Finder or iTunes File Sharing while preserving their folder hierarchy - Adjust page-margin cropping and fine-tune rotation for each PDF - Switch to right-to-left page turning, primarily for Japanese books - View two pages side by side - See your approximate position in the PDF with a subtle ▲ indicator ■ Not Supported - Cloud synchronization of PDF files - Moving or renaming files within the app - Writing to or editing PDF files - Bookmarks, highlights, annotations, or text selection - Page zooming
Screenshots
Verdict
The clearest difference is in-app purchases: BookPDF at none against Offline PDF Viewer's 1. Offline PDF Viewer's advantage is update cadence (daily vs every 2 days). 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. Offline PDF Viewer sells 1 one-off in-app purchase. BookPDF asks for nothing beyond the download.
BookPDF ships an update every 2 days, Offline PDF Viewer daily. The most recent releases landed on October 11, 2026 and October 18, 2026 respectively.
| Parameter | BookPDF | Offline PDF Viewer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days | Daily — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18 | 17.6 — better |
| Further details — not scored | ||
| Size | 2 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuta Sugawara | takaaki024 |
In-app purchases
BookPDF
No in-app purchases
Offline PDF Viewer
- Support Developer$2.99









