Not just heart and pedometer, an app could also monitor mental health, which is not an easy task. It is the idea of some researchers from Dalhousie University (Halifax) who have developed an application called Prosit able to identify anxiety or depression taking into account how the user uses the phone.
The CBC site reports that among the parameters that the app takes into account, there are physical activity, sleep, frequency of calls, the history of messages, musical tastes but also apparently imperceptible data such as the speed of writing a message and changes to the status of your profile
Additionally, users are required to record 90-second audio to describe the most emotional moment of their week and to self-rate their feelings on a scale of one to five.
At the moment, about three hundred people are testing Prosit, half of these are patients in therapy. With growing concerns about provacy, using the app requires signing a consent form.