(PS. I know i was shocked too!)
Easy business On Screen Keyboard makes entering values easy and fast without the android keyboard popping up and down to get in your way.
Calculate perm_data_setting Enter any 2 known variables (2 sides or a side and angle) to have this calculator figure out the rest of the missing values.
Visibility visibility Colored text boxes show you which values you entered while the white one's show the calculated values.