I was browsing for a sprinkler controller with good reviews online, when I came across one called Rachio Gen 2. It was an Amazon best seller for some time now, but as I dug deeper I found that this spring they came out with the new one, which is called Rachio 3 and can be connected wirelessly to a flow meter also by the same company,. The flow meter is supposed to be available starting from this spring as well, but I can`t find any sources for it yet.

Anyway if you are interested I wrote a review which you can read here: https://yourgreenanswers.com/rachio-3-smart-sprinkler-controller/