Calibre Sync for Android & iOS

[PeterT]

And another new release; now includes preliminary support for TeraBox

[dizzy274]

Hi
Since the TeraBox release it's not closing correctly for me. Just hangs on blank screen.

Ian.

[nephtys59]

The new update didn't fix the covers issue with Pcloud, though ...

[dizzy274]

So many updates!! My problem with CS not shutting down correctly has been fixed.

[Incanus]

Hello:

I'm running Calibre Sync v6.83 on my Android 16 One UI 8.0 Samsung Galaxy A54 5G.

Whenever I try to open an ebook from Calibre Sync, my KOReader v2026.03 will show me another e-book, that was previously opened using KOReader's file manager.

Calybre Sync will work fine with another reader software, such as MoonReader.

Is this an Android, Samsung, Calibre Sync or a KOReader issue?

Has anyone experienced the similar problem and solved it: how?

Awaiting your kind reply,

[CardcaptorRLH85]

Originally Posted by Incanus

Hello:

I'm running Calibre Sync v6.83 on my Android 16 One UI 8.0 Samsung Galaxy A54 5G.

Whenever I try to open an ebook from Calibre Sync, my KOReader v2026.03 will show me another e-book, that was previously opened using KOReader's file manager.

Calybre Sync will work fine with another reader software, such as MoonReader.

Is this an Android, Samsung, Calibre Sync or a KOReader issue?

Has anyone experienced the similar problem and solved it: how?

Awaiting your kind reply,

It's an Android problem. I'm having the same issue on my Pixel 10 Pro Fold running Android 17 QPR 1 Beta 1 but not on my Galaxy Tab S7+ running Android 13 (both using Moon+ Reader). Something changed in the last few versions of Android that doesn't allow Calibre Sync to directly open files in your reader of choice. Does anyone have a workaround for this?

[jbusnengo]

Originally Posted by CardcaptorRLH85

It's an Android problem. I'm having the same issue on my Pixel 10 Pro Fold running Android 17 QPR 1 Beta 1 but not on my Galaxy Tab S7+ running Android 13 (both using Moon+ Reader). Something changed in the last few versions of Android that doesn't allow Calibre Sync to directly open files in your reader of choice. Does anyone have a workaround for this?

Are you sure that it's an Android issue? I have no problems opening books from Calibre Sync in FBReader. I'm using a Pixel 6 with Android 16.

[Incanus]

Originally Posted by jbusnengo

Are you sure that it's an Android issue? I have no problems opening books from Calibre Sync in FBReader. I'm using a Pixel 6 with Android 16.

As you may read on my original post, I've also had various results depending on the reader app.

[jbusnengo]

Originally Posted by Incanus

As you may read on my original post, I've also had various results depending on the reader app.

I did see that. I was responding to CardcaptorRLH85's blanket assertion that it was Android "that doesn't allow Calibre Sync to directly open files in your reader of choice." If the issue occurs with one app but not another, isn't that app the logical first place to look?


If you try to open an epub from your device's file manager app, does it give you the same problem? If so, I'd think that would make it unlikely that the problem is with Calibre Sync.

[Incanus]

Originally Posted by jbusnengo

If you try to open an epub from your device's file manager app, does it give you the same problem?

Yes: I just checked and it appears that I can't open an ebook file from my file manager app using KOReader as the reading app.

Originally Posted by jbusnengo

If so, I'd think that would make it unlikely that the problem is with Calibre Sync.

You're quite right. It could be a problem of the file manager app and/or the KOReader app (permissions or something similar).

Thanks for your help and insight!