HOW TO: Synchronise reading position between several devices running Freda

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Edit: If anyone has same problem, I installed Chrome and made it the default browser and login page appeared immediately entering the app.

Thank you for adding that point - indeed that's correct: if you're having trouble with getting the Freda Android app to log on to OneDrive, it may be fixed by switching your default browser to Chrome.  This is the result of some obnoxious security rule that Google has built in to the Android operating system, and so far I didn't find any way to work around it.

Once you've completed the OneDrive sign-in using Chrome, and got Freda connected to OneDrive, you can then revert to using whichever browser you prefer - it just needs to use Chrome for the first sign-in (and the bit where it displays the prompt asking you to give permission for Freda to access your OneDrive)

No problem   
I've been using Freda on windows for a few years and love it. I was using fullreader on android but it failed to open some of the epubs I downloaded from j-novel, so I found out that Freda has an android app too after 2 years..
And now I can sync. my books   So thank you.