Amazon Kindle
Free
Amazon Kindle is a series of e-readers designed and marketed by Amazon.com.
iBooks
Free
iBooks is an e-book application by Apple Inc. for its iOS and macOS operating systems and devices.
Google Play Books
Free
Google Play Books (formerly Google eBooks) is an ebook digital distribution service operated by Google. Users can purchase and download ebooks from Google Pla…
GoodReader
Commercial
GoodReader is an iOS application used to view documents in different formats, including .doc, .pdf, and .xls.
Compare NOOK with alternatives
Compare Google Play Books and NOOK and decide which is most suitable for you.