Comment by dml2135

If your goal is just to easily sync your own ebook library with a Kobo device, I've found that something like this isn't really necessary.

There is a config file on the stock OS that you just need to change, and you can point the Kobo store to your own instance of Calibre Web.

This lets you sync and download your own books to the device over wifi.

I played around with KOReader a bit but found the stock software simpler to use. All I really need is to not be tied to an ebook store.