Pros:

• Idea / Innovation
  The idea of "Fast Charging" is to maximize charging, simple right ?.

• Design / UI / Spec
  The UI is simple.

• Features / Advantages / Benefits
  Fast Charging offers faster battery recharge process.

• Price
  This app is free to use.

Cons:
From some of the reviews I read on Googleplaystore, this app was initially able to optimize the recharging process, but the longer, this application just did not give anything.