The really amazing thing here is that it should take a full four seconds to launch a calculator application on a mobile phone.

That should be instant, no delay at all.

A calculator application with such limited functionality should be well under 100 K and load in a split second.

That's a limitation of the platform, not the calculator. The CPU in the first-gen and second-gen iPhones is pretty slow. There is essentially no such thing as an iPhone app that loads instantaneously.

I bet you could build it in a weekend, too?

errmm... does this count ?

A casio fx something or other clone.

The binary was 61107 bytes long (statically linked).

http://ww.com/qwmcalc.txt

Took about a week. I don't recall claiming it only took a weekend.

Apologies for the 'classic' style coding, it's pretty old code. The window manager this talks to was for the Qnx operating system.