I've seen screensaves for computers which have done this in the past however I thought this was a really great way of utilising phones whilst we sleep. Would be nice to see iOS however I understand why that could be a problem.
Your smartphone is a small but powerful computer. When it's idle - like when you're asleep at night - that power goes untapped. DreamLab puts that power to use for good to fast track cancer research. When it's plugged in and fully charged, each phone is given a tiny research problem, processes it, and sends the result back to the research team at Garvan.