The 6.4 update to Runkeeper has borked my iPhone 6 battery life. In the last 24 hours it has had 10.3hours of background activity apparently and used 35% of my battery. Battery fully discharged from leaving charger at 10.30 to 0% at 4.30 pm (6 hours!) This is far worse than usual, ie before the app updated two days ago. I use Runkeeper pocket track but their faq says it will not affect battery life. I think they broke it. Has anyone else had the same experience?