You’ve had a caddie on your bag. Now, you can have one in your pocket. Designed for the iPhone and the iPad (and in 2014, Android), the TourCaddie Pro is a keen-eyed GPS that offers detailed 3-D maps and real-time distances to targets on more than 40,000 courses around the world. It also lets you keep course notes and, like a real caddie, provides club suggestions (provided by professionals) for every shot you play. $30 annually, www.pgatourcaddie.com