Both Center Text Mode and Eye Trainer Scroll Mode help you learn to read faster both on and off the computer.  This is because: (1) AceReader paces you to read at faster speeds, which helps you break the bad habit of sub-vocalization (pronouncing the words to yourself as you read); and (2) Words are flashed on the screen and then go away, so you are forced to continue reading forward (you can't re-read text or let your eyes wander back).