※FREE version contains ads, but you still can give it a try :
● Swiping function - simply as you can do two swiping and show the result.
● Quick startup app
● Speed Percentage (%) button - suit for calculating discount or group dinner sharing
● Speed Percentage (%) button - can combine for quick execution (for example, $ 100 + 5% = 105%)
● Big buttons - avoiding mis-typing, most common problem of touch-screen button.
● Single-handed layout, 4.7-inch and below are easily make single-handed control
● Revolutionary non-equal sign design, displaying result immediately
● Wisdom save & load value function
● Double-zero (00) button, convenient for large numerical calculation