Fast Callback

How many times in a day you refuse an incoming call from your relatives or your friends just to call them back? This is a very common task when you wish to take advantage of a more convenient mobile phone contract or just let your contacts not to pay when they call you.
When you receive a call this App shows an overlay button that let you refuse the call and immediately call your contact back; everything just by tapping one button! You can choose for which contacts the call-back function is available as well as the button's style, size and position in order to let the overlay button fit perfectly with respect to the screen which is shown by your smartphone when you receive a call.
This is the paid version of the Fast Callback Free App: you are encouraged to try the free version before buying it in order to check that the App meets your needs.