- Apps are available or being developed that could alert you about the risk of depression
- A new app called Purple Robot identified 87% of users with likely depression, according to a study
- Questions remain about how much these apps help people
(CNN)Getting a diagnosis of depression usually involves filling out questionnaires about your mood and undergoing lengthy interviews with a psychiatrist. But smartphone apps might be able to handle some of that work, and at least tell you if you are at risk of depression, simply by collecting GPS and other data, according to a new study.