FolioTone turns PDFs and text into Vietnamese speech on your iPhone and iPad. Import a book from Files, open a page and choose Listen from page start or Listen from here. With continuous listening enabled, FolioTone continues through following pages and can turn pages with the audio. READ PDFS YOUR WAY • A library with covers, progress, search, sorting, favorites and finished books. • Read the original PDF or switch to text view; adjust text size, line spacing and reading appearance.