Glo How to Sync reading position with Android for NONE Kobo Books

[Ephoras]

Well, title says most of it.
Can someone explain to me (in easy to follw steps)
if there is a way to sync my reading position of Books i did NOT purchase from Kobo but loaded on my reader via Calibre as epub?

I mostly read with my Kobo Glo, but i don't allways want to take it with me, so it would be nice to sync my reading positions with Android.

I guess if at all it is possible via Calibre, so i need that for sure (i already use it for all my Books)
And i saw the Calibre Companion App for Android, so maybe i could use that too?
Currently my Calibre Library is stored inside my Onedrive, i don't know if thats of any help, can move it to GDrive, too.

I really hope there is a way to do that and an mostly automatic way would be awesome

[Ken Maltby]

If the stock readers can't, you might add KOReader, it can progress sync between devices running KOReader. I have done so between my Kobo and my Android tablet. It can be installed on Kindles, Kobos, Pocketbook, and some Androids.

Luck;
Ken

[Ephoras]

well that is sad, because KoReader does not seem to work on my phone. all i get if i try to start the app is a black screen