Some time ago I mentioned an iOS library for creating many different charts with a nice clean look called PNChart.
Here’s an open source library based on PNChart, but designed for the Apple Watch called NKWatchChart from Peng Guo.
NKWatchChart supports bar, pie, line, circle and radar charts. Just like PNCHart you can easily customize the colors, labeling, and chart values.
You can find NKWatchChart on Github here.
A nice library for drawing charts on the Apple Watch.