Twin Key Calculator
By Yamato software
Open iTunes to buy and download apps.
There are two ten-keys in a calculator. It is convenient. In case of 2 numbers of calculation, you can decrease 1step. It's 3steps calculation.
-Enter left value with left key(s) and enter right value with rigtht key(s). Then push a operator key.
-Each ANS key can copy answer value to fomula.
-Round off slider doesn't need recalculation to show ronded value.
-After calculation you don't need to use "C" or "AllClear" for next calculation.
It is convinient in the following calculation repeatedly.
-Tax or tip calculation
What's New in Version 1.1
To work for iPhone.