Four Calculator 與 Calculator (Recall Musical) 使用情況與統計

Recall calculator is a best choice for doing simple math calculations. It have made daily life calculations so easy ; you can recall the expression after calculating expression, you can even edit the expression after evaluating the expression by calling recall button and add more numbers and calculative expression. It contains a font controller so that you can see and tally the whole expression before and even after evaluating the long expression. Like scientific calculator it contains both backspace and clear button to delete one character and whole screen respectively.