Doesnt work on iPhone 6 Plus iOS 9.0.2

Im sorry to say that the app doesnt work on my iPhone 6 Plus, though I know as a matter of fact that it used to. I used the app for almost a year, then stopped due to not being able to meet pacts after a sudden change in lifestyle. I wanted to get back in the gym pact routine, only to find that support has dwindled and I cant start again. The app simply does not launch, Ive tried rebooting, re-installing the app and rebooting again. Nothing happens, please fix the issue.

TimoCT about Pact: Earn Cash for Exercise and Healthy Living, v4.3.4