Smartphone app recognizes stress and depression

The Dartmouth research this article mentions:<p>Authors: Rui Wang, Fanglin Chen, Zhenyu Chen, Tianxing Li, Gabriella Harari, Stefanie Tignor, Xia Zhou, Dror Ben-Zeev and Andrew T. Campbell<p>StudentLife: Assessing Mental Health, Academic Performance and Behavioral Trends of College Students using Smartphones<p><a href="http://studentlife.cs.dartmouth.edu/studentlife.pdf" rel="nofollow">http:&#x2F;&#x2F;studentlife.cs.dartmouth.edu&#x2F;studentlife.pdf</a>

Even Microsoft is working on a mood driven device that works based on the emotional state of a user. They have filed a patent application for this concept.<p>The mood driven device uses various sensors to determine mood of a user and then change its shape that visually mirrors user’s emotional state.<p>The patent application also suggests that Microsoft will work on a robotic butterfly that will move its wings according to your mood that represents your emotional state.<p>You can read more about it here - <a href="http://greybmusings.wordpress.com/2014/07/04/microsoft-device-that-behaves-based-on-your-mood/" rel="nofollow">http:&#x2F;&#x2F;greybmusings.wordpress.com&#x2F;2014&#x2F;07&#x2F;04&#x2F;microsoft-devic...</a>

Isn&#x27;t owning a smartphone a sign of depression by itself?