It's not exactly parallel processing, but the Dark Sky app already does its forecasting calculations on the iPhone: http://jackadam.github.io/2011/how-dark-sky-

It's not exactly parallel processing, but the Dark Sky app already does its forecasting calculations on the iPhone: http://jackadam.github.io/2011/how-dark-sky-works/ http://jackadam.github.io/2011/how-dark-sky-works/ > The reason we encode velocity data as an image is so we can pass it off to the GPU on the iPhone and iPad. Both the storm prediction and the smooth animations are calculated on the device itself, rather than the server, and all the magic happens directly on the GPU.