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# Kobo Stack Syncs Sideloaded Books for a Fee
- URL: https://blog.harshkohli.com/kobo-stack-cloud-sync-subscription/
- Published: 2026-11-06T21:56:52.000Z
- Updated: 2026-11-06T21:56:52.000Z
- Description: Kobo Stack uploads EPUB/PDF to the cloud and syncs notes for CA$3.99 or £2.99/mo. OS 6.0 beta; first outside the US. What to try free.
- Author: Harsh Kohli
- Tags: Tech News, Software

Rakuten Kobo is finally adding the “email yourself an EPUB and read it everywhere” trick Kindle users take for granted — but as a paid add-on. **Kobo Stack** uploads your own books and PDFs to Kobo Cloud, syncs progress and notes across devices, and launches first outside the United States with the company’s big **OS 6.0** beta.

## What happened

Kobo’s help center now documents [About Kobo Stack](https://help.kobo.com/hc/en-us/articles/38802863972503-About-Kobo-Stack-features-supported-devices-and-how-to-sign-up?ref=blog.harshkohli.com): a subscription for uploading personal files to Kobo Cloud (up to **50 GB**), syncing them with reading progress and annotations, plus extras like Stack-only workbooks and a 3-year extended warranty on eligible devices. You can drag and drop on kobo.com or email files to a personal Stack address. Supported types are **PDF, EPUB, and LCP EPUB**, capped at **200 MB** per file.

[The Verge](https://www.theverge.com/tech/1028715/kobo-stack-cloud-sync-ebooks-epub-pdf-email-files?ref=blog.harshkohli.com) reported the same day that Stack is tied to the OS 6.0 e-reader update (optional beta now, wider release later), and that CEO Michael Tamblyn said the first countries are Canada, Ireland, Australia, New Zealand, the UK, and Spain — not the US. Verge cites Canadian pricing at **CA$3.99/month** and UK pricing at **£2.99/month** (\~US$3.80 / \~₹320 at recent rates), with a **90-day free trial**. Cancel and you get about **60 days** to download uploads and export notes before Kobo says they are permanently deleted. Kobo’s own Stack page for the UK lists the same £2.99/month after trial. The Verge’s story also circulated via [@verge on X](https://x.com/verge/status/2118760066937663512?ref=blog.harshkohli.com).

On e-readers, Kobo’s help page currently lists Stack for devices on software beta **6.0+**, naming the Libra Colour, Clara Colour, and Clara BW. Mobile needs the Kobo apps at iOS 11.5+ or Android 11.1+. Separately, OS 6.0 brings free goodies that do *not* need Stack: multiple Libby library cards on one account, CloudLibrary on partnered libraries, lower stylus latency where pens exist, bigger accessibility fonts, and native **LCP DRM** EPUB support so some library books no longer need Adobe Digital Editions.

## Why it matters

Sideloading by USB or Dropbox/Google Drive on select models still works for free. What Stack sells is cloud sync of *your* files and notes the way Kobo Store purchases already sync. That closes a long gap versus Amazon’s free Send to Kindle — and it also means personal manuscripts, DRM-free bookstore EPUBs, and scanned PDFs live on Kobo’s servers under a recurring fee.

The country list matters. US and India are not in the opening wave. Indian Kobo owners who buy Clara/Libra units from grey import or travel still wait for Stack availability, while UK/Canada/AU readers can trial it now if their account region matches.

## What to do

- **In a launch country:** update the e-reader to the OS 6.0 beta from Kobo’s instructions, open kobo.com/stack (or your local Stack page), start the 90-day trial, and send one small EPUB by email before you dump a whole library.
- **Check the device list.** If your reader is older than the Clara/Libra Colour generation, wait for Kobo’s promised expansion to 2018–2024 models rather than buying Stack hoping the firmware will appear tomorrow.
- **Skip Stack if USB is enough.** Multiple Libby cards and LCP support land with OS 6.0 without paying. Only subscribe if cloud sync of sideloaded files is the pain you actually have.
- **Plan an exit.** If you cancel, calendar the 60-day window, download everything, and export annotations. After that, Kobo says uploaded files can be wiped for good.

## My take

I get why Kobo charged for this — cloud storage and sync cost money — but asking readers to pay monthly for a workflow Amazon gives away free will sting, especially when the free OS 6.0 bits (Libby cards, LCP) are the parts many people needed most. CA$3.99 or £2.99 is not huge (\~₹280–₹320), yet it adds up next to a one-time e-reader purchase, and the 60-day deletion clock after cancel is a sharp edge if you treated Stack like a second Dropbox.

For anyone outside the launch list, including most Indian buyers, the move is still USB sideload plus the free OS 6.0 update when it reaches your region — and keep backups of notes on the computer, not only in a vendor cloud. If your “library” is more movies than novels, our [Jellyfin setup guide](https://blog.harshkohli.com/jellyfin-home-media-server-setup/) is the self-hosted parallel; for phones that hoard PDFs and EPUBs until storage dies, pair that habit with [freeing iPhone storage without nuking photos](https://blog.harshkohli.com/free-up-iphone-storage-without-deleting-photos/) so the reading apps you already have stay usable.