HiReader vs ReadPDB

HiReader is a dedicated local ebook reader designed to create a reading space that belongs only to you. It supports a wide range of ebook formats including TXT, EPUB, MOBI, PDF, AZW, AZW3, AZW4, PDB, and PRC, along with powerful features such as detailed reading statistics, bookmarks and notes, cloud sync, and smart document management. Features Group Management • Create unlimited groups to organize your local documents efficiently. Multi-Format Support • Read all major ebook formats: TXT, EPUB, MOBI, PDF, AZW, AZW3, AZW4, PDB, PRC. Flexible Import Options • Import documents via Wi-Fi transfer, iCloud, AirDrop, or share from other apps. Reading Layout • Adjust character spacing, line spacing, paragraph spacing, and margins. • Includes 10 built-in fonts with support for custom fonts. Custom Themes • Choose from 15 built-in themes or create your own themes and covers. Bookmarks & Notes • Add bookmarks and notes at any time, with easy management and review. Reading Statistics • Track detailed reading data with total statistics, daily calendar heatmaps, and per-document insights. Cloud Sync • Sync reading progress, statistics, book files, and bookshelf organization across devices. We are committed to delivering the best reading experience. If you have any questions or feedback, you can always contact us directly within the app. Subscription Terms Unless canceled at least 24 hours before the end of the current period, your subscription will automatically renew at the agreed price and duration. The fee will be charged to your Apple ID account within 24 hours prior to the end of the current period. You can manage or cancel your subscription at any time in your App Store account settings. Any unused portion of a free trial period (if offered) will be forfeited when you purchase a subscription. By subscribing, you agree to our Terms of Service and Privacy Policy. Privacy Policy: https://t15ehm6hgj9.feishu.cn/docx/Op86dE0i2ovOY1xXPwfcvu6lnVg Terms of Service: https://t15ehm6hgj9.feishu.cn/docx/OArodZ4OXoUiXOxFgIrcplsXn6e

Bring your Palm-era ebook library back to life. ReadPDB opens compatible, non-DRM iSilo 3 and PalmDOC ebook documents stored as Palm Database (.pdb) files. Import books directly from the Files app and read them on your iPhone or iPad—no account required. Reading is offline. Features • Import one or more compatible .pdb books from the Files app • Filter your library by book title • Render supported text formatting and internal links • Automatically return to your last reading position • Adjust text size for comfortable reading • Choose Light, Dark, or System appearance • Navigate with Back, Forward, and Home controls • Highlight passages for later reference • Share selected text using the standard iOS share sheet • Remove imported books from your library at any time • Contact us from Settings • Optional lifetime ReadPDB Pro for unlimited imports after three free books Offline reading ReadPDB has no accounts, subscriptions, advertising, or tracking. Your books remain on your device and are never uploaded. Optional ReadPDB Pro is a one-time in-app purchase processed by Apple. Purchase status is recorded with RevenueCat so the unlock can be restored. The bundled sample does not count toward the three-book free library. Compatibility ReadPDB currently supports compatible, non-DRM iSilo 3 documents and PalmDOC-family documents (including TealDoc and AportisDoc). The .pdb extension was shared by many Palm OS applications, so other .pdb files may use formats that ReadPDB cannot open. The following are not currently supported: • Password- or registration-protected books • MOBI and other Palm Database variants • Damaged or corrupted files • Unrelated files that also use the .pdb extension • PDF documents • Embedded images within documents ReadPDB does not include, sell, or download books. Import only documents that you own or have permission to use.