Spire's health tracker sticks on clothes and never needs charging
It's totally waterproof so it'll survive the laundry.
calories
8Matrix PowerWatch hands-on: The promise of a world without chargers
Your body is this smartwatch’s power source.
Sweetgreen's iOS app logs calories directly to Apple Health
Because even salads can add up.
Fitbit now gives you credit for VR bike rides
It also works with the nutrition app Habit and lets you do on-demand Peloton biking classes.
Smartphone accessory 3D-scans your food to count calories
NutriRay3D's laser-scanning tech has gone to crowdfunding to bring accurate calorie counting to your smartphone.
