iOS 8.0.2 on iPhone 6 Plus not working
 

Gas Tracker app on iPhone 6 Plus iOS 8.0.2 not working. App comes up reporting an error, I click ok and a box comes up stating I have been logged out then before I can do anything else, it just disappears. I have tried several times and the exact same thing happens every time.

I was able to log in on my computer and update todays fuel up, went back to the iOS and still not able to use it as of this evening.

Have you tried deleting and re-installing the app?

Read this.