Mandatory tracking and still does not work. I have to use this app for access at school. The app requires location services to be enabled at all times. I saw the company's response to other reviews saying to set location access "only when using the app," but I tried this and it doesn't work. The school told me the app only works if location services are always enabled. Even then, it only opens the door half of the time. I feel bad the school pays for this and the developer gets to sell our data.