I’ve been building a dashboard with Google data studio. This is one of the pages:
But I’m not sure if I can use to calculate correlations or get insights in other ways than just looking through the data or put two variables on the same graph 
I’ve also considered making a business out of making a generic quantified self dashboard product, but it seems like people’s needs might be too different, and they have too many different trackers, which all has to be supported.
Currently I’ve been playing around with the idea of making a more specific quantified self dashboard for a specific use case, and then make integrations with as many trackers as possible for that use case. But I’m not sure about which area to choose yet