In partnership with Sony, a team of scientists from Stanford have developed an app called Folding@home that lets you contribute to the fight against cancer, Alzheimer's and other diseases while you sleep.
The project began back in 2007, involving a computing system that simulates proteins in a process known as folding. By understanding how proteins morph and mutate within the body, scientists are better able to understand how impaired molecules can be harmful to the body.
With the Android app, you're able to lend your processing power to science, so that millions of complicated calculations can be made to better understand folding in proteins. In order to use the app, the phone must be fully charged and connected to a charger as well as the Internet.