Sync Between Devices (iCloud sync feature)

It would be cool if the app settings stayed synced among devices. I want to use it on iPad, iPhone and Mac. I would like configuration settings, book library, and current reading position to be synchronized for all my devices. Right now, I have to upload the book to each device I use and set my preferred settings again.

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It would be amazing if the app could have some kind of sync feature. At the moment I use 2 devices but need to look up where I left behind on the other device.