Postmates

This app is pretty much a life-changer: They offer delivery from 1,000s of stores and restaurants. Essentially, they connect you with a local courier, who can grab that extra charger at the Apple store, or pick-up healthy lunch from a restaurant that might not typically deliver, and bring it to your doorstep in under an hour. All transactions happen under cover of the app, meaning cash doesn’t exchange hands, and you can track your courier’s progress through the city (you’ll also see his or her photo and information). Delivery starts at $5, and ranges up, depending on location. Postmates is expanding rapidly: They just launched in Austin and Silicon Valley, and already serve San Francisco, Seattle, New York City, Washington, D.C., Chicago, and Los Angeles.