CaliMob vs Calibre Companion — Full Reader + 8 Cloud Backends
Calibre Companion and CaliMob both connect to your Calibre library, but they solve different jobs. Calibre Companion (Android) can act as a Wireless Device, browse Content Server / OPDS, and use cloud folders (Dropbox, OneDrive, Google Drive, Box, and more) — but it has no built-in reader; it opens books in external apps. CaliMob is a full reader (EPUB, PDF, comics, audiobooks) on Android and iOS, with multiple backends including Google Drive, OneDrive, Dropbox, WebDAV, FTP/SFTP, OPDS, and Content Server. It does not implement Calibre’s Wireless Device (Connect/Share) protocol.
Feature Comparison
| Feature | CaliMob | Calibre Companion |
|---|---|---|
| Calibre connection | Drive, OneDrive, Dropbox, WebDAV, FTP/SFTP, OPDS, Content Server | Wireless Device + Content Server/OPDS + cloud folders |
| Calibre Wireless Device (Connect/Share) | ✗ HTTP Content Server only | ✓ |
| Built-in reader | ✓ EPUB, PDF, comics, audiobooks | ✗ Opens external reader |
| Platforms | Android, iOS | Android |
| Google Drive | ✓ | ✓ |
| OneDrive | ✓ | ✓ |
| Dropbox | ✓ | ✓ |
| WebDAV / Nextcloud | ✓ | ✗ |
| FTP / SFTP | ✓ | ✗ |
| OPDS catalogs | ✓ | ✓ Browse + download |
| Calibre Content Server | ✓ | ✓ |
| Works away from home | ✓ Multi-backend cloud + built-in reader | ✓ Cloud folders; Wireless Device / Content Server need local network |
| Comic reader (CBZ/CBR) | ✓ Manga mode, double-page | ✗ External app |
| Audiobook player | ✓ MP3, M4B, OGG, FLAC | ✗ External app |
| Calibre metadata sync | ✓ Full (series, tags, covers) | ✓ Via Wireless Device / library modes |
| Bidirectional metadata / Read sync | Optional Calibre plugin / CaliWeb | ✓ While connected as Wireless Device |
| Offline reading | ✓ In-app | Depends on external reader |
| Text-to-speech | ✓ | Depends on external reader |
| Highlights & annotations | ✓ Synced via CaliWeb | Depends on external reader |
| Multi-library | ✓ | ✓ |
| Price | Free (premium available) | €3.49 one-time |
| Last updated | 2026 (active development) | Infrequent updates |
Who should use CaliMob?
CaliMob is for anyone who wants a complete Calibre-to-mobile solution in a single app: library + built-in reader for every format Calibre manages. There’s nothing else to install. If you read on the go, commute, or travel, CaliMob’s strength is multi-backend cloud plus an in-app reader — Google Drive, OneDrive, Dropbox, WebDAV, FTP/SFTP, OPDS, or Content Server — on Android and iOS. Optional Calibre plugin / CaliWeb backup can sync progress and metadata across devices when you enable it.
Who should use Calibre Companion?
Calibre Companion still makes sense if you prefer Calibre’s native Wireless Device (Connect/Share) workflow, already have a reader app you like (Moon+, ReadEra, …), and are fine with Android-only. It can also pull from Content Server / OPDS and from cloud folders. Think of it as a library client that hands files to other apps — not as a reader itself.
Cloud sync vs local connection
Both apps can work away from home via cloud folders. Companion’s Wireless Device and Content Server paths need your phone and desktop Calibre on the same network; its Dropbox / OneDrive / Drive (and similar) modes do not. CaliMob’s pitch is the combination: multiple backends — including WebDAV and FTP/SFTP that Companion lacks — plus a full built-in reader so you are not juggling separate apps for ebooks, comics, and audiobooks.
CaliMob also offers an optional Calibre plugin / CaliWeb path for bidirectional progress and metadata across devices. Companion is not “files only, one way” in every mode: while connected as a Wireless Device it can sync metadata and Read status with desktop Calibre. CaliMob simply does not implement that Wireless Device protocol; it uses HTTP Content Server (and cloud/OPDS backends) instead.
Built-in reader vs external apps
Calibre Companion is a library / transfer client, not a reader. It downloads books and hands them off to another app — you need Moon+ Reader, ReadEra, or similar for ebooks, a separate app for comics, and yet another for audiobooks. That’s 3–4 apps to manage.
CaliMob reads EPUB, PDF, MOBI, AZW3, CBZ/CBR comics (with manga mode and double-page view), and plays audiobooks natively. One app handles everything. Your reading position, highlights, and annotations are all in one place and can sync across devices via CaliWeb backup.
Looking for a Calibre Companion alternative?
Is CaliMob a Calibre Companion alternative?
Yes — for most people who want the Companion job (library on the phone) plus the reader Companion never had. You keep cloud or Content Server / OPDS access, add WebDAV and FTP/SFTP, and get EPUB, PDF, comics, and audiobooks in one app on Android and iOS. If you specifically need Wireless Device (Connect/Share), Companion still owns that protocol. For a short “what should I use instead?” overview (including Calibre Sync and justRead), see Calibre Companion alternative.
In short
CaliMob replaces Companion and your separate reader app when you want cloud + local backends, a built-in reader for every format, and active development on Android and iOS. Calibre Companion remains a fit if you rely on Wireless Device Connect/Share and already like your external readers. For most Calibre users who want one maintained app, CaliMob is the clearer choice.
Ready to try CaliMob? Get it free on Google Play · App Store, or explore the demo library with 30+ free books, comics, and audiobooks. Have questions? Read the FAQ, the setup guide, or the Calibre Companion alternative page.