Of all the iPhone applications, “NUMBER” is the easiest calculator app to use.
The design is simple, but the innovation is the Ease of use.
The calculator is easy-to-use because of the incorporation of modern concepts of Cognitive Science.
- Even the size of the human finger was considered in the creation of the touch screen function.
- Swipe input correspondence:
Swiping one finger upwards results in addition; swiping two fingers results in multiplication.
Swiping the finger downwards results in subtraction; swiping two fingers results in division.
The “swiping” concept was designed for ease and natural use.
Review this app, and we will include the following additional functions: