Mobile Minutes: Yik Yak; 30-second recharge; iPhone 6 wait; doctors on Apple’s HealthKit

Today in mobile marketing – Yik Yak, big in schools, is a hit with investors too; Recharge your phone in 30 seconds? Israeli firm says it can; Two months later, there’s still a wait to buy the iPhone 6; I asked 20,000 doctors about Fitbit and Apple’s HealthKit, and here’s the answer.