A superb reader for chm & ePub ebooks

CHMate Premium is the best chm e-book reader at App Store. It allows you not only to highlight but also to annotate a particular portion of texts that may interest you. Also, it allows you to import e-books from iCloud & Dropbox or Desktop web browser. Moreover, it allows you to organize your e-books based on collections. Although it is quite versatile, it is quite easy & smooth to use it. I highly recommend it.
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[last review]
Better than ever! Now, it can read ePub e-books.
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[Old review]
Several years ago, I suggested that the developers should have added highlighting & annotation ability in this app. Surprisingly, they did listen, and added these features in a short time. Ever since, Ive been comfortable with using CHMate Premium! In a word, CHMate Premium is the best CHM e-book reader on the iOS platform.

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[very old review] This is a very nice e-book reader for e-books in chm format. However, it would be perfect if the developer could add new features such as highlighting & annotation in the very near future.

Huang-Taiwan about CHMate+: EPUB & CHM Reader, v6.8.2