As far as I know the only syncing of reading position between devices and calibre are for the Kobo ereaders using my Kobo Utilities plugin. Each device would need something written to pull the reading position back to calibre, store it in a common format and then update it back. That gets worse for Android devices as there are a lot of reading apps which will all work differently.
As you use the Kobo app, it might be possible using code from my plugin. I suspect that the same database is used for the app as for the devices. Unfortunately, I have no way to test this theory as I don't have an Android device.
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