Spritz indicates the ORP by making it red, and so your eyes don't have to move. The company says the method makes communication faster, easier and more effective by removing the inefficient eye movements associated with traditional reading.
Using this app means that you could all 309 pages of "Harry Potter and the Sorcerer's Stone" in under 77 minutes. The typical college-level reader reads at a pace of between 200 and 400 a minute.