Hi, my name is Zach, and I started this blog because I was unhappy with activity trackers on the market circa Q3 2013. Existing products make accessing raw data impossible, both by quantizing it into discrete units ( steps, points, etc.) and by blocking access to time series information. As a biomedical engineer, I wanted to analyze sensor data to find interesting signals which the designers of consumer products might have ignored in the name of simplicity. This blog will document my attempt to create algorithms which do this, and give the extracted data context through correlation with external events. I’ll probably make some errors, so if you see something wrong with any of my posts, please let me know!