What's New

You can now create your own calculators! Save into the cloud and share with others!
To get started, go to Definition, then Calculators. There are downloadable examples.
Also: new functions and JS object property access in RPL+.

App Description

ND1 is an advanced, programmable RPL/RPN calculator that can calculate with complex numbers, fractions, vectors, matrices, strings, images, algebraic expressions, and other types of objects. (Even colors!)

In v1.6, you can create your own calculators and interactive tools and share them with the community. Define your own keys, menus and other UI elements. Map them to internal functions and/or your own.

Over 500 built-in operators deliver a total of over 2,000 functions across all object types.

ND1 begins as a modern day update to the RPL calculator line from HP (28, 48-50g) and then adds surprising features and extensibility.

It offers programming in RPL+ and JavaScript, networking, and modern graphics (HTML5) and storage (a database with local and cloud backing). ND1 has an unlimited stack.

Try ND0 before you buy, if you're unsure ND1 is for you.

There's plenty of documentation for ND1.

Please see the support website for full specs, a "Quick Tour", tutorials, reference documentation, and a discussion forum, where support can be found.

iPhone Screenshots

(click to enlarge)

ND1 screenshot 1 ND1 screenshot 2 ND1 screenshot 3 ND1 screenshot 4 ND1 screenshot 5

App Changes

  • June 24, 2011 New version 1.3.9
  • July 23, 2011 New version 1.3.10
  • January 04, 2012 New version 1.4
  • January 04, 2012 Price increase: $5.99 -> $9.99
  • February 01, 2012 New version 1.4.1
  • February 23, 2012 Price decrease: $9.99 -> $7.99
  • April 14, 2012 Price decrease: $7.99 -> $5.99
  • October 18, 2013 New version 1.5
  • November 14, 2013 New version 1.5.1
  • January 30, 2014 Price decrease: $5.99 -> $2.99
  • February 10, 2014 Price increase: $2.99 -> $5.99
  • March 10, 2014 Price decrease: $5.99 -> $2.99
  • March 14, 2014 Price increase: $2.99 -> $5.99
  • March 16, 2014 Price decrease: $5.99 -> $2.99
  • March 20, 2014 Price increase: $2.99 -> $5.99
  • March 21, 2014 Price decrease: $5.99 -> $2.99
  • November 05, 2016 New version 1.6

Other Apps From Oliver Unter Ecker

Realtime Mandelbrot Realtime Mandelbrot Lite April's Fool: Your IQ ND0 RPN Graphing Calculator