In this day when data about your game is readily available, you’re putting yourself 2 down on the first tee if you’re not taking advantage of it. The leader in tracking your game, Arccos, is like having a caddie on your phone—and on your bag—complete with a yardage book GPS-coordinated to that particular day and all its weather conditions, giving you yardages from every conceivable and inconceivable location on the property.

Arccos Caddie uses GPS-enabled sensors that either attach unobtrusively to the butt end of your clubs or are embedded in otherwise normal-looking grips to track your round. That’s every shot hit with every club. When you pair it with your phone, it provides club recommendations based on a myriad of metrics. It provides a suite of statistics (yes, the tour standard strokes-gained metrics are in there) so you know everything from how bad your bunker game is to how you’re hitting your 5-iron farther than your 4-iron. In short, it tells you just where in your game (driving, approach, short game, putting) the issues are and how much you need to improve to reach your goal.

It's never been easier to measure what you're doing with your golf swing. You can connect a sensor to your body, like the HackMotion—which measures the bend in your wrist and how that bend changes through the course of the swing. Or, you can affix the sensor to the club, like the Blast Golf dongle that connects to the shaft of the putter—where it measures swing tempo and consistency and compares it to players around the world.