There are special tools for VoiceOver users to manage the cursor, select text, and find and correct misspelled words by stepping through them. Voice-based Proofreading and Phonetic Search are invaluable for people with dyslexia. Also included is the research-proven Dyslexie font.
Besides these unique features, Voice Dream Writer also comes with everything you would expect from any great writing tool.
Voice Dream Writer is a US$9.99 download from the iTunes App Store.