A while back I wanted to create an ASP.Net MVC client for Google Fit that charted my weight. It turned out that offline Google authentication wasn’t as straight forward as one would hope. This article will explain how it works using Google Fit as an example. The code is applicable to the whole Google API. In this example only one authorization is stored and used across multiple accounts.
I think Google Fit is a wonderful platform. It connects multiple devices and apps to give you insight into your fitness. I connected a Withing Smart Body Analyzer scale to the system. What I’m missing is a simple min / max weight per day graph. This blog describes how to get the weight data out of Google Fit into your C# application. You can use your own chart solution to plot a graph.