I've had some stability issues. Some people have great success, some not so much. In any event, I'm testing a new build, actually a 2.0 version of the app. I should have an update shortly on when it's going to get pushed to the store.
I should caution you that while the update will fix some issues, it could introduce new bugs. It's also not as consistent branding-wise as I'd like. There's plenty of good stuff as @Kadelic will tell you, version 2.0 has some nice features. Initially there were bad reviews of Tapatalk, but they seemed to have ironed out most of the issues.
My focus is on getting an app that is an usable state. This crashing stuff has got to go.
After upgrading my iPhone 5 to iOS7, the eiC app constantly disappears into the background 20-30 second after I launch the app. I have tried removing and re-installing the app, have done a hard reset, restored from a back up then wiped out the phone and restored as new and re-downloaded the app to no avail. I first noticed this immediately after upgrading to iOS 7 then it stopped disappearing and began working normally until this morning. I am currently using Safari to access the website with no problem.