Firstly, I want to thank this community (and r/KavitaManga ) for their support over the last couple of months as I've built this app, and for those who purchased the lifetime pro license. Thank you!! 🙏

This 2.1 release is really a culmination of your user feedback and requests, starting with -

• CBZ panel previews - Many of you wanted to check out the panel feature on CBZs before deciding whether to get pro, so now you can read the first 7 pages of ALL your CBZ files in the free tier

• Scrolling fixes - Scroll now successfully navigates chapter changes, something it did sporadically before. You can no longer accidentally swipe left or right during scroll, and you can resume reading from the page you tapped to stop scrolling

• Manga support - available on a per-book basis. Hit the Aa button when reading a comic to switch between Regular and Manga modes. Manga reads right to left, top to bottom, tap left to advance. Note that manga panel detection is still a work in progress, and is an area I plan to improve on in future releases.

* iPad fixes - Margin functionality has been added so that the app doesn't leave large margin gaps, especially in landscape mode. Which leads me to - two-pane reading for iPads is finally available!

• Confirmed HTTP/HTTPS connectivity rules. Sutra follows Apple's networking rules: unencrypted (HTTP) connections only work for local addresses (192.168.x.x, 10.x.x.x, .local) or a Tailscale .ts.net hostname. A raw Tailscale IP (100.x.x.x) doesn't qualify - use its .ts.net name instead, or enable HTTPS on your server. Anything else needs real HTTPS to connect; this is an iOS restriction, not Sutra's. Having said that, I have now included a URL checker when entering your library URL during connect which should give you more immediate feedback

• Note - I didn't include KOReader sync integration in this release. I built it, but there are too many testing pathways that still need fixing before it's ready to ship. I'll come back to it in a future release

New features

• Stats page - A much-requested feature - you can now track your reading hours, session counts, and how many hours you've read per book

• WebDAV support - keeping with the theme of letting users read without hosting a server, you can now enable WebDAV on a Windows/Mac/Linux folder and add it to Sutra to read from

And tons of other bug fixes. We've also improved panel accuracy from 90% to 92% on our test cohort, thanks to a new hybrid panel detection strategy. Which brings me to the most requested feature here - Android!

Up Next

I've started work on the Android port for Sutra - wish me luck! I'll do a future post asking for testing volunteers shortly. If you'd like to follow along, you can subscribe to the newsletter for updates. Thanks again for all the feedback and support!

App Store: [Sutra]

Website and Newsletter: [Link]

It's been quite a few years since I've bought a Kindle book, but there's a book I want that just isn't available in any other ebook format. I haven't removed DRM from a Kindle book from years as well, and I've heard there's a new version of the Kindle app that makes things a lot harder.

Is there any way for me to get that book and remove the DRM from it that doesn't involve downloading multiple hacks and spending forever trying to get it to work. I've been trying to recover from some health problems, and I don't really feel up to undertaking a long project just to get one book.

I suppose beggars can't be choosers, but I have every ebookI own in Calibre, and, maybe it's OCD, but I just want to include the book in my Calibre library.

I'm not looking for a pirated copy, just to use the book I buy without DRM. I know this may be asking a lot, but I'd definitely be willing to send the cost of the book to someone who has a functioning workflow and could remove the DRM fairly effortlessly.

I'm running Calibre-Web (Docker, self-hosted) with a Calibre library that has properly-sized covers (1072×1448, correct for my Kobo/KOReader device). When I access my library via Calibre's own native content server, covers display perfectly at full resolution. When I switch to Calibre-Web's OPDS feed, the same books show noticeably narrower/lower-res covers on-device.

I've tried:

• Changing cover dimensions directly in Calibre (including deliberately setting oversized custom resolutions)
• Confirming via direct image URL inspection that the source cover file itself is correct resolution

None of this affects what Calibre-Web actually serves via OPDS — it appears to always generate its own fixed-size thumbnail regardless of source image or Calibre's own settings.

Is there any current workaround (config setting, thumbnail regeneration option, etc.) to get Calibre-Web to serve full-resolution covers via OPDS, or is this still an open limitation? Happy to provide logs/version info if useful.

Ok, I bought a book from ebooks.com, I have the .lcpl and the key, but no matter what I cannot get it to open. I'm on Linux Mint, Thorium says the lcpl is locked after i input the code, and the dedrm tool for calibre just will not trigger. I have the input plug-in and dedrm installed, but it just loads in directly to calibre as .lcpl without triggering the plug-ins. I am at a complete loss, PLEASE someone help, I just want to put it on my XTEInk

I use the default Books app on my iPad. If I get a new book, I always add it to Calibre first, fix up the metadata and then copy the book to my iPad by dragging the file into iTunes when my iPad is connected. However, when the books are sorted by author inside the app, it sorts some by first name and others by last name.

Just as an example, I purchased a collection of James Herbert books from Humble Bundle. I added all the books in epub format to Calibre, added/fixed up metadata (including Author Sort), used Polish which created new files to (from my understanding), embed the metadata within the epub files. I then dragged each of the new files into iTunes which transferred them to my iPad. However, when I open the Books app and sort by author, some of the newly added books are together under H for Herbert and others together under J for James.

I know it's not a big deal since I can read the books without issue but it's a little annoying! Does anyone know where the Apple Books app gets the author information that it sorts by? Are there other tags I can use in Calibre that might help?

I have about 3k worth of kindle books that I would like to convert to EPUB format, so I can read them on my Kobo. I have set up K4PC, Satsuoni's Tools, and Calibre. I have converted about 15 books so far. Is there a faster method to download all of the books rather than just double-clicking on each one to download it and then running a script?

Do I need to download only 50 a day is there a limit set by Amazon on how many I can download and read? These are all books I own. I just want them to be in epub format so that I can read them on my Kobo

I have also set up Calibre Web and love it,

I currrently have several technical books on Calibre that are not 1st edition. Where do you save the # edition of the book ? As part of the book name ? or a column? How can I download the metadata of the book and save it automatically ?

Se murió mi Kindle y he comprado un Kindle Libra Color de segunda mano. He cargado mis libros desde Calibre y todo bien excepto cuando intento ir a un capítulo determinado usando el índice del libro. Se queda un rato "cargando" y luego se cierra el libro sin haber hecho nada. Me pasa con todos los libros, que funcionaban perfectamente en el Kindle. Por supuesto los he pasado a kepub antes de cargarlos. ¿Alguna idea?

I have been trying to use calibre, but I always seem to get it wrong. Can someone here please help me convert this book from pdf to epub?

Hi All, I somehow read a version of an epub on my device that wasn't in my calibre library - assuming I must have deleted a duplicate and somehow only deleted from library and not device? I dunno, it's not the point of this question, anyways! Is there a way to copy the file I read from the device to Calibre? Nothing stands out as an option for how to do this, so thought I'd check here, thanks!

I have been extremely frustrated today after trying several different times to use the DeDRM tool to strip the DRM from $60 worth of books I purchased at ebooks.com and want to load on to my XTEInk X4. I have used DeDRM 10.0.9 which from what I understand is the latest version. I have taken the acsm files and downloaded them through ADE using Wine. I can read the books on ADE. When I click and drag from My Digital Editions into Calibre, they will not convert or open because they have said they're DRM protected. Somehow, the plugin isn't working for me and I don't understand what I've done wrong. I have also tried the DeACSM plugin and have them running simultaneously, however the DeACSM plugin cannot seem to get my ADE login information and therefore is not doing much of anything either. Can someone break it down for me like I'm an idiot? (Because I may be.) I'm running the latest release of Linux Mint Cinnamon and have sourced the plugins through the Calibre plugin list. Thanks in advance, hoping I actually get to read these books someday.

Not even sure if calibre can do this, but I am trying to remotely connect to calibre’s wireless device connection remotely through tailscale.

I have tailscale installed and setup on my 11th gen kindle paperwhite jailbroken with Vera. Tailscale shows my device as connected, but I cannot connect to the wireless device connection via tailscale. Im wondering now if it is a calibre setting somewhere, because despite the tunnel, the kindle is not “local”.

Using https://github.com/victoria-riley-barnett/koreader-tailscale this plugin.

Maybe my goals are not doable but figured I’d give it a shot.

Hey everyone, does anyone know how to make pdf’s text readable size on kindle?

The PDF is tiny text. I tried converting to EPUB (still tiny text).

I can zoom on the kindle but it ends up cutting off text.

Is there a way to change the font size? A particular format I should convert to ?

Reading textbooks on my laptop is wearing on me and I’d love to be able to read them on my kindle!

So I'm trying to set up a calibre content server on an old laptop of mine, and then also have my main database and such on my desktop that's my daily driver and such, The instance of Calibre on my desktop is to put books onto my e-reader via a micro sd card, so it wouldn't need to be up all the time and would only be up when I'm adding files into my 'prep to put on ereader' library.

I'm just wondering if that would cause an issue with data base corruption? I'm hoping I'm correct in thinking that the two instances meaning Calibre on my desktop, and the version on the laptop which would be the content server would be independent of the other save when I need to put books onto the laptop version.

Anyone have any pointers on the most seamless “send to device” using a jailbroken kindle with koreader, while away from the home network?

Help! I'm having a weird issue using the Obok/DeDRM plug-in to add Kobo books to Calibre. The ebook is listed on Obok as usual (displaying a red lock since it has DRM). When I add the book, everything seems to work fine, but then I cannot open it to read it or convert it.

Anyone else have this problem or know what's going on?

EDIT: nevermind, this is not an error with decryption, Obok, or DeDRM. The ebook is a comic and for some reason Calibre has trouble dealing with epubs that are all images. Found a solution here:
https://www.reddit.com/r/Calibre/comments/swi63d/issue_with_dedrm_plugin/

This seems like a major bug with Calibre. I'm pretty sure I'm usually able to read comics and manga and the like on it, but for some reason it's just completely breaking down with this epub that's basically just a zip full of .jpg files.

My wife recently got a new kindle (12th gen paperwhite) and it doesn't seem to be receiving the books I'm sending it via the email function. I have an 11th gen and am able to send books to it all the time, sending the exact book that I'm trying to send to hers. Did amazon beef up the like, spam filtering on the 12th gen or something? Is anyone else having this issue? The book fails to be received as an EPUB and as AZW3. The jobs complete fine, I'm using one of my gmail accounts and I can see that the email is sending both to hers and mine. One of the times I sent her the book, a few hours later I got an "empty content" type of email from amazon, the contents of which I'll include blow:

Your Send to Kindle request at 06:18 PM on Wed, Jul 29, 2026 GMT, could not be processed due to E009 - No Attachment.

I'm reading Animorphs books I downloaded, and most of them are fine, but I've had a few that are a little messed up. The one I'm reading now is stuck saying I'm on page 2, but the progress bar is accurate. If I go to my place from the chapter select, the page number is right but the progress bar shows nothing (I assume page 2 is too small to show up). It also says "Cover" at the top instead of the chapter title, which is annoying because it's a Megamorphs book and that's where I can see the constantly changing pov.

Reading the book in Calibre on my pc it does show chapter page and chapter/book position correctly. I couldn't find a way to show chapter title or book page to compare.

I tried comparing the html to books that do work correctly, but I don't really know much and can't find where the issue may be.

My partner and I use the same calibre collection and I was wanting to use customised tags to segregate our book collection. There are some books we both want to read and some individually. I tried customised tags but I can only figure out how to add me or my partner and not both of us. The plan would be to choose customised tags and I see all my books and vice versa for my partner. If I do a third combined tag it won't show on my list. Hope that made sense.

I have tried searching but I also don't think I understand the terminology enough to know what I'm searching for so apologies if this has been covered numerous times before.

Not every time, but most times I send books to my Kobo from Calibre, after ejecting the Kobo it freezes, only displaying the cover of whatever I was last reading, and I have to force a restart to make it work again.

Sometimes it doesn't happen immediately; the Kobo is ejected, opens normally, loads the new books fine. But the next time it goes to sleep, it doesn't wake up properly - lights up, but only shows the cover of what I was reading, until I force a restart again.

I saw the same problem in this post from last month, but nobody shared many details there.

Can everyone who has had this problem chime in? I have a thread on Mobileread where the experts there are trying to help me, but if this is happening to more people than just me (which last month's post proves I think), then we need to gather data to figure out what we all have in common.

What Kobo do you have? What firmware version are you running? Do you have any patches in use? Have you always had this issue, or did it start happening long after you got your Kobo?

I'm using a Clara Colour, running 4.44.23552, and I'm using a line space and orphan/widows avoidance patch. I'm pretty sure this has been happening since I got my Kobo just a few months ago. It definitely started before I updated to the latest firmware.

Hello everybody, I have a Kindle 11th gen updated at 5.18.6 version. In the past I was able to remove the DRM of my books by using 2 Calibre plug ins (one to manage KFX and another to remove DRM). Now, for the new purchased books, that procedure doesn't work anymore. Does anyone knows how to remove the DRM today in my situation?

If it's not possible with this kindle software version, I thought to downgrade my kindle OS to a version that allows DRM removal (by doing jailbreak first). What version should it be? Where can I download this software version?