I recently discovered a new e-book app that I really like. What sets this app apart is its built in text-to-speech (TTS) technology which can read books and documents to you. The is useful for English learners who want to work improve their reading and pronunciation skills. I also find it useful while traveling or doing household chores.
It has a large selection of voices and you can adjust the voice speed as well. The only thing I don't like is that the pauses between sentences are a bit too long. Hopefully, the developer will fix this in the next update.
It has a built in store that makes it very easy to download 5000+ free classic books. Also, you can easily import books from any source or scan your device for existing books.
The free version has fairly unobtrusive ads at the bottom of the screen but you can remove them for $3.
Unfortunately, there is no iOS version, but if you know of an iPhone app with similar features, you can let me know in the comment section.
Pocket for News
If you like to have your news articles read to you, Pocket recently added TTS technology to its app as well.
TTS for your Web Browser