Their github has all of the same info but also answers some very important questions about the service https://github.com/bear-metal/tunemygc?. Namely they tell you that it sets a bunch of environment variables and they tell you what information they collect.

What I want to know is why this needs to get recommendations from a web service. Do they have to collect a bunch of data to learn good recommendations for different situations? Isn't it much simpler to have an algorithm optimizing the parameters locally, or does that take too long to learn good values?