Fast Callback Free

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 FREE version of the Callback App: it may display Ad at the end of the call started by the call-back function. If you wish, buy the Callback App for avoiding Ads.

Please help me to translate this App in your own language: http://barban.oneskyapp.com