For leaping over regulatory hurdles to disrupt urban transportation.
For revolutionizing the way the world remembers everything, one app at a time.
For rewarding people for using their apps--and in the process creating a new form of mobile advertising.
For transforming smartphone features into smart medical diagnostic tools that measure heart rate, stress, and sleep quality.
For proving that mobile payments can be as easy as saying your name--and serving everyone from swap meets to Starbucks.
For designing a keyboard app that learns to predict what users type, changing the way millions tweet and text.
For becoming the leader in mobile commerce ($13 billion in sales volume in 2012) by making it easy for customers to buy and sell on their phones.
For reinventing the phone call by melding voice, photo, and text into one experience.
For connecting thrifty companies with a smartphone army eager for odd jobs.
For creating a marketplace for secondhand apps, allowing developers to recoup resources.