It looks like smartphones are one-upping their master’s degree in location tracking with a doctorate in tracking your cannabis usage.
![Study Finds That Smartphone Data Can Detect Cannabis Usage – Greatist Study Finds That Smartphone Data Can Detect Cannabis Usage – Greatist](https://magazine.dagga.za.net/wp-content/uploads/2017/08/Dagga-Magazine-Cannabis-News.jpg)
It looks like smartphones are one-upping their master’s degree in location tracking with a doctorate in tracking your cannabis usage.