HP 15c Calculator vs Smart Adding Machine

Meet the next generation of your favorite scientific calculator. The official HP 15c app, now brings a completely redesigned interface, a modern look, and improved functionality—while preserving the precision and reliability trusted by professionals for decades. This RPN calculator offers the features, algorithms and calculation sequences of the original 15c Scientific Calculator conveniently stored on your iPhone or iPad. The HP 15c You Know – Now Better Than Ever • Official emulator of legendary calculator device by HP • Identical algorithms, layout, and keystrokes as the original HP 15c • RPN (Reverse Polish Notation) for fast and efficient input • Matrix calculations, Complex functions, Numerical integration. • Ideal for math and engineering students and professionals • Programmable – up to 448 lines Be Ready. Anywhere. Anytime. Whether you’re in class, at the office, or on the go, HP 15c is ready when you are. Just launch the app on your iPhone and get to work. Download HP 15c today and experience the perfect blend of classic functionality and modern design.

This app has a numeric keyboard. It may not always be visible. If it is not visible, pressing the input button that has the text 'Insert an Amount or ...', will cause one to appear. If you want to hide it, select the button on the left titled 'Hide KB'. The Adding Machine contains a visual tape with two columns of numbers. The left is the amount you keyed. The right column has in a '1' which is the count. The system puts in a '1' for you. As you add items, the tape grows. The last item is always followed by an empty item colored red. This color red is important because it indicates where your next entry will be placed!!! After entering a number, press the 'Save' button. If this is your first entry, two items will appear on the tape. The first one will contain the number you keyed. The second will be red with the amount showing: 0.00 and a count showing 1. This pattern will continue as you add items On the left side of the screen are 11 buttons in a column. The first six are for moving the red color - but not its contents. This allows for the correction of errors. The first two are: first - go to tape start & second to tape end (red item). The second two go up one item and down one item on the tape. The last of the group switch between amount & count - usually used to change the count from 1. There a 4 named buttons the effect the tape: Clear, Insert (an empty row where the red is, Delete(the row that a red item) and Hide KB. The keyboard has no minus sign. There is a slider button that can be used to cause an number to be negative. It is red for emphasis At least 50 items can be entered. The tape can be scrolled by using your finger to see the entire tape. At the very top of the screen is a 'Help' chevron that switches to a page of help text.