Calculator+ HD

This calculator meets my needs. It is not only a basic calculator but, has different modes that come in handy doing school work.

It can't handle numbers as small as 10^-20 (gives error) even though can handle large numbers like 10^27. Strange and confusing arrangement of function keys: for example, trig functions sin, cos and tan are scattered all over the keypad. No reciprocal key (1/x). Looks like another scientific calculator designed by tech nerds who are good at programming, but aren't very familiar with scientific/engineering calculations.

It's an excellent calculator, but it could use better graphing capability