Runtastic Me will not open on IPhone 6 Plus

The Runtastic Me app will not open on
my iPhone 6 plus. The App tries to Open for an extended period and then closes. The only option that I have is to delete the App and loose all my Orbit data. The tech support on the Website is very poor. I am not happy with this after spending $100 for the orbit. This App needs to be fixed!

radioflieger about Runtastic Steps - Pedometer