Look into other Solutions
(https://www.rescuetime.com/features)
Digital Solution that aids with helping stop users from procrastinating and manage their time better. Features like Time Tracking, Website & App Blocking, Goal Tracking and Reports generated from data from days and weeks. There are other features but they are more for workplace time manage, e.g. Timesheets.
These methods that this app uses help build a system that a user can use to manage their time better than without, for example the Time Tracking feature of RT. This feature allows a user to have their time in each app or website tracked into the app for later refection.
Privacy Issues - How is the User Data used
How could it track -
Look into the Physical Device more detail