Cal Widgets offers you a large set of widgets for your iPhone (iOS), and complications for your Apple Watch (watchOS). All of these widgets and complications surround the Health App data. So if you want to display your kcal intake, how much you drank, how well you slept last night, how your weight is developing etc. - look no further!
And handful set of of widgets, and a giant load of complications for every watch face, with multiple data sets, should cover all your needs for your custom screen/watch layout!
This project will evolve more and more over time, so feel free to tell me about widgets or complications you are missing, and I may just implement them.