How to Sync Reading Progress Across Kindle, Kobo, and Apple Books

August 15, 2026· Updated August 27, 2026BookConv Team
SyncMulti-deviceKindleKoboApple BooksEbook

Reading across multiple devices is convenient until your progress stops syncing. This guide explains how Kindle, Kobo, and Apple Books each handle sync, which format to choose, and how BookConv's free, browser-based converter helps you prep files for seamless cross-device reading — no software to install.

Why Sync Fails Between Devices

Most reading apps don't sync across platforms natively. Amazon Kindle syncs only within the Kindle ecosystem. Apple Books syncs only within Apple devices. Kobo has its own closed system. Cross-platform sync requires manual file management or third-party tools.

The core problem: Each platform uses different formats (AZW3 for Kindle, EPUB for Kobo/Apple) and different cloud ecosystems. Without a unified format, you're locked into one device family.

Format Strategy for Multi-Device Reading

EPUB: The universal format. EPUB works on Kobo, Apple Books, Google Play Books, and most Android readers. If you read across platforms, EPUB is your best friend.

MOBI: The legacy Kindle format. Older Kindles support MOBI, but Amazon recommends AZW3 for newer devices. Neither syncs with non-Kindle platforms.

AZW3: Amazon's modern format. Better typography than MOBI, but still locked to Kindle devices and apps.

PDF: Universal but rigid. Works everywhere but doesn't reflow on small screens, making it poor for e-ink readers.

Manual Sync Methods

Method 1: Send to Kindle via email.

  • Convert your EPUB to MOBI or AZW3 using BookConv

  • Email the file to your Kindle's unique address

  • The book appears in your Kindle library and syncs to all linked devices


Method 2: USB transfer.
  • Connect your device to your computer

  • Drag the converted file into the documents folder

  • Eject safely and the book appears in your library


Method 3: Cloud storage sync.
  • Upload your EPUB to Google Drive or Dropbox

  • Open the file in your reading app's cloud import feature

  • The app downloads and adds it to your library

Platform-Specific Tips

Kindle:

  • Use Send to Kindle app for iOS/Android to push files wirelessly

  • Enable "X-Ray" feature for AZW3 files (requires proper metadata)

  • Kindle Unlimited books cannot be converted or transferred


Kobo:
  • Native EPUB support with excellent sync within Kobo ecosystem

  • Adobe DRM-protected ebooks won't sync to other devices

  • Use Kobo Desktop to manage your library


Apple Books:
  • iCloud sync works automatically for books added via iTunes or Direct Open

  • Files must be in EPUB or PDF format

  • Apple Watch companion app shows reading progress only for synced books


Google Play Books:
  • Upload EPUB or PDF via browser, read anywhere with internet

  • Automatic sync across all signed-in devices

  • Limit: 1,000 books per library

Common Pitfalls to Avoid

DRM-protected purchases. Books bought from Kindle Store, Kobo Store, or Apple Books often carry DRM that prevents conversion or transfer. Look for DRM-free editions or public domain alternatives.

Assuming renaming works. Changing a file extension from .epub to .mobi doesn't convert the format — readers will reject the mismatch.

Ignoring format compatibility. Not all EPUB features work on all devices. Simplified EPUBs (no custom fonts, minimal CSS) have the broadest compatibility.

Frequently Asked Questions

Can I read Kindle books on my Kobo?

Only if they're DRM-free. Amazon purchases are protected and won't open on Kobo. Convert DRM-free Kindle books to EPUB using BookConv, then transfer to your Kobo.

Why doesn't my reading progress sync between Kindle and Apple Books?

These platforms use separate ecosystems with no native sync. To share progress, you'd need to manually note your location in each app, or use a third-party service like Goodreads.

What's the best format for cross-device reading?

EPUB is the most universally supported format. Convert your books to EPUB using BookConv, then distribute to different devices as needed.

Can I convert Kindle books to read on other devices?

Only DRM-free Kindle books. Protected purchases cannot be converted. Public domain books from Project Gutenberg or your own purchased DRM-free files work fine.

How do I sync reading progress across all my devices?

Use Google Play Books — upload your EPUB/PDF once and it syncs automatically across all signed-in devices. Or stick to one ecosystem (Kindle-only or Apple-only) for automatic sync.

Does BookConv help with multi-device reading?

Yes. Convert your books to the optimal format for each device: EPUB for Kobo/Apple Books, AZW3 for Kindle, PDF for universal compatibility. Our format comparison guides help you choose.

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