HK graph allows you to generate graphs of the activity data the Health app collects. You can select any 2 types of data (steps, distance, flights climbed, elevation gain, weight), the date range of the data to graph, and the resolution of the graph. You can then use the familiar pinch/squeeze and scrolling gestures to explore the graph. There is an extensive set of controls over the display of the graph and how it is labelled. For dense graphs, the data labels can be limited to the highest and lowest values.
This app make your Health data much more useful and interesting