Introduction In part 1 of this series, I will demonstrate how to interact with the Fitbit API in R. Huge credit to Matt Kaye for creating the fitbitr package that provides an interface between R and the Fitbit API. If you are familiar with R and you have a Fitbit, you should have success following what I have laid out below. Install the fitbitr package From CRAN: install.packages("fitbitr") Or the development version from github: