Does Xiaomi MIUI have an app to open ePub files?

There isn’t a pre-installed app on your Xiaomi phone that read ePub files. But, you can use the following apps that support ePub format.

1. Google Play Books – https://play.google.com/store/apps/details?id=com.google.android.apps.books
2. Aldiko Book Reader – https://play.google.com/store/apps/details?id=com.aldiko.android&hl=en
3. FBReader: Favorite Book Reader – https://play.google.com/store/apps/details?id=org.geometerplus.zlibrary.ui.android
4. Moon+ Reader – https://play.google.com/store/apps/details?id=com.flyersoft.moonreader

For Google Play Books, you’ll need to upload your ePub files to My Library in order to open them.