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Most typing in the world today is done on virtual keyboards on touchscreens.

I’ve always hoped someone would make an APL for iOS and Android. The code density and use of symbols seems like a good fit for small touchscreens.

Most editors let you use an input prefix, so typing `y gets you ↑ for example. Makes it a lot easier

What about using gesture recognition on a smartphone or tablet? It could become a useful portable calculating/coding app that doesn't need much typing. I know there are J apps and web APLs available, but not gesture ones that I know of.

Came here to say exactly this -- an APL-like notation + programming environment would seem to be a great way to program on a tablet + stylus. I'd love a notebook environment where I can mix equations, doodles, executable code, & their output.