Microsoft Band

With Apple, Google, and pretty much everyone else getting into the wearable computing business, it was inevitable that Redmond would join the fray. The Microsoft Band is a wrist-mounted fitness tracker watch, sporting 10 sensors that include an optical heart rate sensor, a UV sensor to keep track of your sunlight exposure, a galvanic skin sensor to measure stress, and built-in GPS. You keep track of everything via a 1.4-inch touchscreen that also shows the expected notifications for texts, phone calls, emails, Facebook, and Twitter, and should you feel like you've done enough healthy stuff for the day, it'll even show your Starbucks card so you can pay for that grande latte without using a card. It boasts a battery life of around 2 days, and it'll work with both iOS and Android, but if you want to bark commands at your wrist like some sort of secret agent, you'll need a Windows Phone to power it's voice-activated Cortana capabilities.