The Calcvier will turn your keyboard into Calculator! Add calculator keyboard to make fast calculations anywhere. No need to switch between apps or use some widget, no need to copy and paste results!
To enable Calcvier on your device:
1) Open Settings app
2) Go to General > Keyboard > Keyboards
3) Tap Add New Keyboard...
4) Tap Calcvier
You can use Calcvier keyboard in any app such Notes, Mail, Safari, Messages and other!