J has been a stable App Store product for 5 years. This new build lets you enjoy J on newer hardware with the latest iOS. It is 64 bit. We also fixed a few minor bugs and a more serious one that prevented ‘keyboard input during suspension’.
J is a general purpose, high-level programming language. J is particularly strong in the mathematical, statistical, and logical analysis of data and visualization of your data is at your fingertips.
If you are new to J and want to be a J programmer, this is a good place to start. If you already know J, you probably think of it as fun rather than work. Now you can have mobile joy of J!