Doximity is a mobile-first secure, online professional network for U.S. healthcare professionals. Physicians can connect with other healthcare professionals, collaborate on patient treatment, grow their practices and discover new career opportunities. Also allows hospitals to find doctors and charges recruiters $12,000 a year, allowing them to send 50 messages a month. Offers information on residency training programs in collaboration with U.S. News & World Report. Claims to have more than 500,000 doctors as of Aug 2015. App available on Andriod and iOS.