Subvocalization (pronouncing the words in your mind while you read).
Re-Reading/Regression (letting your eyes wander back to re-read text).
AceReader paces you to read at higher speeds. At these higher speeds, it becomes physically impossible to subvocalize. And because AceReader displays text by flashing word sets, you will be forced to read ahead and will not have the opportunity to regress.
AceReader will also help you:
Reduce Your Eye Fixation Time (time spent when your eyes are focused on a single point).
Expand Your Eye Fixation Zone (ability to read a wider text width when your eyes are focused on a single point).
Increase Your Re-Fixation Speed (ability to reposition your eyes at a rapid rate).