Big tech stores · Open source alternatives · Full privacy comparison
TL;DR: Kindle, Google, and Kobo require accounts and track your reading. Even the best open-source alternatives (Librera Reader, ReadEra) either request unnecessary permissions or are closed source. LibraVault is the only app that is fully FOSS, account-free, and enforces privacy through Scoped Storage — not just policy.
| Feature | LibraVault | Kindle | Google Play Books | Kobo |
|---|---|---|---|---|
| Account Required | ✓ No | ✗ Yes | ✗ Yes | ✗ Yes |
| Reading Tracking | ✓ None | ✗ Extensive | ✗ Extensive | ✗ Yes |
| Offline Operation | ✓ Full | ✓ Full | ~ Limited | ✓ Full |
| DRM-Free Format Support | ✓ Yes | ✗ Limited | ✗ Limited | ✗ Limited |
| EPUB Support | ✓ Full | ✗ No | ✓ Yes | ✓ Yes |
| PDF Support | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes |
| Audiobooks | ✓ Yes | ✗ No | ✗ No | ✗ No |
| Cloud Sync | ✓ No | ✗ Yes | ✗ Yes | ✗ Yes |
| Open Source | ✓ GPL-3.0 | ✗ Proprietary | ✗ Proprietary | ✗ Proprietary |
| Internet Permission | ✓ No (F-Droid) | ✗ Yes | ✗ Yes | ✗ Yes |
| Broad File Permissions | ✓ No | ✗ Yes | ✗ Yes | ✗ Yes |
| Cost | ✓ Free | ✗ Books vary | ✗ Books vary | ✗ Books vary |
Librera Reader and ReadEra are the two biggest non-big-tech EPUB readers on Android. They're worth considering — here's how they stack up on the things that actually matter.
| Feature | LibraVault | Librera Reader | ReadEra |
|---|---|---|---|
| Account Required | ✓ No | ✓ No | ✓ No |
| Reading Tracking | ✓ None | ✓ None | ✓ None claimed |
| Open Source | ✓ GPL-3.0 | ✓ GPL-3.0 | ✗ Closed source |
| Internet Permission | ✓ No (F-Droid) | ~ Yes (optional use) | ✗ Yes |
| Scoped Storage Only | ✓ Yes | ~ Legacy on old Android | ~ Partial |
| EPUB Support | ✓ Full EPUB 2 & 3 | ✓ Full | ✓ Good |
| PDF Support | ✓ Yes | ✓ Yes | ✓ Excellent |
| Audiobooks | ✓ Full player (MP3/M4B/OGG…) | ~ TTS + basic audio | ~ TTS only |
| Format Breadth | ~ EPUB / PDF / Audio | ✓ 20+ formats (FB2, DJVU…) | ✓ 20+ formats (FB2, DJVU…) |
| Offline Operation | ✓ Full | ✓ Full | ✓ Full |
| Ads | ✓ None | ✓ None | ✓ None |
| Cost | ✓ Free | ✓ Free (donation optional) | ✓ Free (Premium upgrade) |
Long-standing GPL-3.0 EPUB/PDF reader with an enormous format library. The most feature-complete open-source reader on Android — and a genuinely good app.
Librera wins on format breadth. LibraVault wins on audiobook support, a cleaner UI, and stricter permission hygiene — no internet permission, Scoped Storage only.
Popular, free, ad-free EPUB/PDF reader with broad format support. Well-regarded UI. Closed source — you have to take their privacy claims on trust.
ReadEra has a polished UI and excellent PDF rendering. But being closed source means there is no way to verify its privacy behaviour — a significant concern for privacy-conscious users. LibraVault's code is fully auditable.
Privacy-first EPUB reader, PDF viewer, and audiobook player. Fully offline, no account required, 100% open source.
Privacy-conscious readers, open-source advocates, users who manage their own ebook library, people who want complete control over their data.
Dominant market player. Extensive DRM library, cloud sync, tight integration with Amazon ecosystem.
Low — Amazon tracks extensive reading data, requires account, uses DRM.
Integrated with Google ecosystem. EPUB support, cloud sync, reading progress tracking.
Low — Google integrates reading data into your broader profile for ad targeting.
Privacy-friendly alternative to Kindle. EPUB support, offline reading, less data collection than Amazon or Google.
Medium — Better than Kindle/Google, but still requires account and tracks reading.
LibraVault: None. Stays on your device.
Others: All track time spent reading, which books/passages, reading speed, bookmarks for analytics.
LibraVault: Not required.
Others: All require account linked to payment method and personal data.
LibraVault: No — all data stays local.
Others: All sync reading progress to remote servers.
LibraVault: 100% GPL-3.0.
Others: All proprietary — you can't verify their privacy claims.
If privacy is your priority, the choice is clear:
Other apps make privacy claims, but they're implemented through policy, not technology. Policies change. Code doesn't lie.
LibraVault gives you the features you want — EPUB, PDF, audiobooks, offline reading — without the privacy tradeoffs.
Learn About Our Privacy CommitmentKindle books are DRM-protected, so you can't directly import them. However, you can use tools like KindleUnDRM (if legally available in your region) or purchase DRM-free alternatives. LibraVault reads any DRM-free EPUB or PDF.
No. We don't sell books. Instead, you manage your own library: purchase from services like Tor.com, Project Gutenberg, Smashwords, or your local library's lending service, then add them to LibraVault.
Not automatically. Your reading progress stays local on each device. You can manually sync by copying your local database or using a file sync service (Syncthing, NextCloud, etc.).
Possibly, but only as an optional feature you can disable. The default will always be local-only for privacy.