When Grayson King was first introduced to inclinometers (slope-angle measuring devices) during an avalanche safety course, he realized that he’d be unlikely to dig one out of his pocket on a regular basis. As an engineer, King is trained to come up with solutions to problems, and this was no different.
King realized that he could create an incredibly accurate inclinometer simply by wrapping a sticker around a ski pole. With the sticker installed, all he needed to do was dangle his ski pole for an on-the-go measurement.
With the help of a successful Kickstarter campaign, King created the PoleClinometer, a $12 sticker that lets you sight both across and down a slope.