Calibre Companion is great for your android device. I use it with OneDrive. It can see your OneDrive repository, download on demand, then open a selection of readers (two of which I like and use).
On Windows 10 tablet, I'm trying to figure out what to do. You can of course run OneDrive on it and use Calibre itself, and I've done that in the past, but I'd like something more like Calibre Companion... I've posted a question asking for the best solution for a Windows tablet to cloud. Or you may be happy with getting a nubbin-type USB device and keeping it up to date and running Calibre itself.
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