Touch 16i is an RPN calculator for programmers and computing scientists. This app implements many features of the beloved HP-16C plus some extras.
The interface is the cleanest possible: just the calculator filling the whole screen. The app supports three numeric formats: American (999,999.00), European (999.999,00) and Indian (9,99,999.00), and supports copy of the value to the clipboard. Touch the left upper corner of the calculator to open the menu and get access to these features.
The main interface has a couple poetic licenses. At the left of LCD, the current word size, the negative number representation, and current window are displayed. At the right, the full number is shown when it does not fit in the display. This extra information is handy when calculating with big integer numbers.
Other features: portrait layout, quick guide, saving memory images, 100% fullscreen, keyboard feedback, and more.