Comparison

Libri Audiobooks vs ReadPDB

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Libri Audiobooks

This app offers an offline e-reader with on-device text-to-speech capabilities, allowing you to listen to books and articles anywhere. It supports multiple languages and voices, efficient storage, and includes a free catalog of public-domain works.

Highlights
  • On-device neural voices
  • Instant listening
  • 45 languages, 150+ voices
  • Text & Web listening
  • Small, efficient voice packs
  • Full PDF & EPUB eReader
  • Sync across devices
Features
Read full description

Libri Audiobooks — eReader + Offline Text to Speech Libri Audiobooks is a full eReader with on-device neural voices, so you can read and listen anywhere on-demand: subways, commuting, flights, rural areas, school or areas with limited data or Wi-Fi. Change speed, switch languages on the fly, and keep storage free — one compact voice (~60 MB) powers all your books. No per-book audio downloads. Features you’ll love: • On-device neural voices — natural, private playback that stays on your device. • Instant listening — tap Play and start immediately with lightweight voice packs. • 45 languages · 150+ voices — switch voices and languages on the fly. • Text & Web listening — paste text or a URL to listen instantly; smarter article extraction preserves clean formatting, and you can save clips to your Library with a title. • Small voice packs (~60 MB) — efficient storage that scales across thousands of books. • Full eReader for PDF & EPUB — customize reading preferences, extended highlighting, search, bookmarks, and more. • Sync across devices — keep your library and settings in sync across iPhone and iPad. • Free Classics Catalog — add thousands of public-domain books right on your device. Why offline matters • Works without a connection (planes, subways, rural) • No need to download 300+ MB per audiobook — keep storage for your treasured photos • Saves data & storage: one voice pack is reused across thousands of books • Private by design: your text stays on your device *Title availability varies by region. Public-domain works only. Terms & Privacy Apple Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Narratorio Terms of Use: https://www.neuracoretech.com/terms Privacy Policy: https://www.neuracoretech.com/policy

About

ReadPDB

Features
Read full description

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

Libri Audiobooks4 screens
ReadPDB4 screens

Verdict

The call

The clearest difference is in-app purchases: ReadPDB at none against Libri Audiobooks's 3. ReadPDB also leads on update cadence (daily vs weekly). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Libri Audiobooks sells 3 in-app purchases, starting at $3.99 per month. ReadPDB asks for nothing beyond the download.

UpkeepUpdate frequency

Libri Audiobooks ships an update weekly, ReadPDB daily. The most recent releases landed on October 7, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Libri Audiobooks versus ReadPDB: the parameters behind the verdict, then further details
ParameterLibri AudiobooksReadPDB
PriceFreeFree
Rating4.5 (8 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings8 — better—
Update frequencyWeeklyDaily — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.617.0 — better
Further details — not scored
Size86 MB13 MB
Age rating4+4+
DeveloperNeuraCore TechnologiesJaime Martin Lozano

In-app purchases

3 purchases

Libri Audiobooks

Subscriptions3
  • Online Voices Monthly3 Days trial$3.991 Month
  • Narratorio$12.991 Month
  • Yearly Subscription3 Days trial$99.991 Year
None

ReadPDB

No in-app purchases

Questions

Is Libri Audiobooks free?
Libri Audiobooks is free to download, with in-app purchases available.
Is ReadPDB free?
ReadPDB is free to download, with no in-app purchases.
Do Libri Audiobooks or ReadPDB have ads?
Neither Libri Audiobooks nor ReadPDB shows ads.
Which is updated more often, Libri Audiobooks or ReadPDB?
Libri Audiobooks ships an update weekly, and ReadPDB daily. Most recently, Libri Audiobooks was updated on October 7, 2026 and ReadPDB on October 25, 2026.

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