Useful calculator widget

It is a simple one-line nine-digit calculator. You can calculating and save your results by one-touch (tap to the number to copy it to clipboard). There is no big number of buttons, and this widget is very usability because of it. An interface of this calculator is designed for the minimization of time for calculating.
This calculator is a widget, because an accessing to a widget is faster than finding and executing an application. It helps in many situations, when you have to do a common calculation. And this cases is more often, than the cases, than you need a scientific calculator. But the real scientific calculating is more useful to do on the PC. That's why the mobile calculator must be simple.
This calculator is optimized to the devices with a small screens (such as Sony Ericsson Xperia X10 mini, HTC Wildfire, Samsung S5570 Galaxy Mini). But this widget is tested for the different phones and it is good for all of them!

Gravitrip - my new game with plasticine graphics. Play and enjoy it!
https://play.google.com/store/apps/details?id=com.gravitrip
https://www.youtube.com/watch?feature=player_embedded&v=mUC_6EJEBb4