smartphone app

You can now monitor your heart rhythm with your cellphone. Dr. Eric Topol imagines a day when patients will be doing a lot more of their own medical testing, with doctors as advisers.

Apps offer games and rewards to keep you taking your prescription medicine. While rewards may not be for everyone, they could give some people a helpful motivational boost.

You probably haven't thought about whether your phone could help diagnose alcohol withdrawal. Well, it can. An app for doctors measures tremors and may help tell if someone's faking it to get drugs.