I think it's hard because in a sense you almost create a context that is not the realistic context we live in. You have people who don't have phones. You have people who don't have phones that are of the right model or operating system. You have people with perceptual disabilities. Some Canadians may have difficulty with the English- or French-language literacy levels necessary to use the apps. A number of people are going to be excluded, in any event, so I think in that context, mandatory or obligatory is problematic.
The other issue is the civil liberties issue of making a form of data collection about location, context and personal health information mandatory. I think once you set a precedent for saying mandatory—