Narrator is an iOS app that converts text documents into spoken audio, essentially creating audiobooks. It supports common file formats like ePub, PDF, DOCX, TXT, and RTF. Users can import files from their device or cloud storage, then listen to them using natural-sounding voices in over 25 languages. The app offers adjustable playback speed from 0.5x to 3x, and allows exporting the audio as .m4a files for offline listening or sharing. Once a document is imported, offline playback is supported, though some voice options require an internet connection for initial synthesis. The app is free, and has been downloaded over 100,000 times with a 4.7 average rating.