ATNSOFT Calculator lets you:
✓ Instantly enter numbers and mathematical expressions using an ergonomic on-screen keyboard and voice input (currently supports English, Chinese, Croatian, French, German, Hungarian, Italian, Japanese, Korean, Polish, Portuguese, Russian, Spanish, Turkish and Vietnamese). Just press the mic button and speak the expression (for example, 74 point 5 times 4 plus 37 = 74.5 × 4 + 37 = 335): it will appear on screen and the result will be calculated immediately!
✓ Make two or more calculations simultaneously. To do this, you can switch editing screens with a horizontal swipe along the top edge. You can give names to screens by tapping the screen number.
✓ Quickly copy the result to the clipboard simply by tapping it. There is a special button for pasting from the clipboard (