TTS Reader is a versatile application that functions as a book reader, TTS reader, text to speech reader, out loud reader, and voice reader. It can read any book format out loud, including EPUB, MOBI, TXT, FB2, PDF, DJVU, RTF, AZW, HTML, RTF, ODT, and even web pages. The application is highly customizable and powerful, based on Librera Book Reader Professional and similar to Balabolka application and @Voice Aloud Reader, Text to Voice.

The TTS functionality of TTS Reader is intuitive and easy-to-tap, with a playback control panel that can be adjusted for speed, pitch, and volume. The application can skip any unwanted symbol, resume reading from the last punctuation mark, and provide expressive breaks at punctuation marks with adjustable duration. TTS Reader also supports remote bookmarks, double-tap on any page to begin reading, Bluetooth headset compatibility and control, and the ability to save books to WAV files. Additionally, users can share web pages with TTS Reader to read them out loud and set a timer to stop reading out loud at a certain point in time.

TTS Reader also functions as a book reader, allowing users to search for EPUB, FB2, PDF, etc. documents and build a library. The application offers filtered book search by title, author, series, genre, etc., and book display sorting by author(s), genre, series, size, etc. Users can leave notes and bookmark pages in all book formats, customize fonts for text, titles, italics, etc., and perform local and online dictionary lookup. TTS Reader also supports multi-word search and bookmarking, open any zip-archived book (epub, fb2, mobi, pdf), and a desktop widget. Additionally, users can convert ebooks to mp3 files.

Overall, TTS Reader is a comprehensive application that offers a range of features for book reading and TTS functionality. It is highly customizable and powerful, making it a great choice for users who want to read books out loud or listen to them while on the go.