I didn't mean to suggest there was anything wrong with it as a reading app. Lots of people swear by it. It's just not a very good indicator of how epubs will look on devices or other epub reading apps.
I don't read many epubs on Android anymore. When I do, I usually use the app associated with the bookstore where I bought it: Kobo or Google Play Books (or one of the library apps if I've borrowed it).
I used to swear by Mantano/Bookari until they broke and abandoned it.
Perhaps others will have better suggestions.
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