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Synchronization is really, really bad. For example, one story shows as 6 chapters, last updated 26th of July, 2021. In reality, if you open the story, it has 8 chapters, and according to email notifications, last update was on 19th of September, 2021. This means you can't rely on an app to track what was updated, without having to sort through emails. Contacted the dev by email back in december 2020, issue is still here. According to play market, I'm using the latest version of the app.