[BetterRed]

Originally Posted by Frank W

I think that the development forum is the best place to ask this question.

Moderator Notice
Well it's not, as is made clear in the PLEASE READ BEFORE POSTING - Purpose of Development subforum sticky at the top of the Development forum.

This subforum is not the place for [. . .] enhancement proposals unless you make clear in your post that you are prepared to develop the enhancements yourself . . .

Your post gives no indication that your proposing to do the development work.

Moved to main calibre forum.

Originally Posted by kacir

... is Calibre Companion app for Android. This will let you to connect to a PC with the installed Calibre and use its database. You can download books to Android ...

Companion will also connect to a calibre library hosted at a cloud storage provider such as DropBox, Onedrive etc, or on external storage connected directly to your Android device via an OTG cable.

The developer of Calibre Companion, Charles Haley, also developed a number of the main Calibre desktop application components, see ==>> calibre - contributors.

BR