The backswing is a blue swing trace, and the downswing is yellow-to-orange-to-red-to-black. Club head speed is the key to greater distance and solid ball striking. As such, SwingTIP provides this color-coded downswing as a visible way to see the increase in your club speed through impact (or to identify a power loss). The darker the color of the downswing, the faster your club head is accelerating through impact.
You can download the iOS App Guide and Android App Guide to learn more about how to Interpret Your Swing.