Leruna vs ReadPDB
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Leruna
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Read EPUB, PDF, and text books with an AI reading companion that understands what is on the page and helps you explore the rest of the book. Leruna is an AI book reader built for people who want to stay immersed while getting clear answers at the moment curiosity strikes. Import your own book or choose a free public-domain classic, then read in a calm, continuous interface designed around the text. ASK YOUR BOOK • Ask questions aloud and hear concise, conversational answers. • Leruna considers the passage on screen and any text you select. • Ask about a character, event, theme, idea, or unfamiliar detail. • When necessary, the assistant can research other parts of the book or search for broader information. UNDERSTAND IN CONTEXT • Tap a word or select an expression for a contextual meaning. • Discover cultural, literary, and historical references connected to passages. • Expand references without leaving the reference list, or jump back to their place in the book. NAVIGATE LONG BOOKS • Browse detected chapters and sections in the Reader Map. • Find text across the full book and move between every result. • Resume from your saved reading position. • Scroll continuously with progressive loading, even in long books. MAKE READING VISUAL • Generate an image of a selected character, place, object, or scene. • Ask the assistant for a specific image while discussing the book. • Save generated images to Photos or share them. • Create an optional book-inspired reading backdrop for light or dark mode. YOUR READING SPACE • Import EPUB, PDF, Markdown, HTML, and plain-text files. • Explore free public-domain books from Project Gutenberg. • Choose between five text sizes, light or dark mode, and assistant voices. • Read and ask questions in the language of your book or conversation. New eligible accounts receive a 30-day Reader trial with a one-time usage pool. No subscription or payment method is required to begin. Optional Reader, Study, and Scholar subscriptions are available with monthly or annual billing and larger allowances for book processing, AI requests, conversational answer audio, and image generation. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. You can manage or cancel a subscription from your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://energized-puffin-45.convex.site/legal/privacy
ReadPDB
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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.
Screenshots
Verdict
The clearest difference is in-app purchases: ReadPDB at none against Leruna's 6. 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. Leruna sells 6 in-app purchases, starting at $5.99 per month. ReadPDB asks for nothing beyond the download.
| Parameter | Leruna | ReadPDB |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Daily |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 31 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Tuan Lima | Jaime Martin Lozano |
In-app purchases
Leruna
- Reader Monthly$5.991 Month
- Study Monthly$11.991 Month
- Scholar Monthly$23.991 Month
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- Reader Annual$59.991 Year
- Study Annual$119.991 Year
- Scholar Annual$239.991 Year
ReadPDB
No in-app purchases









