This is not the first time this has happened!
i tap the icon on my iPad, there is a brief blink of the screen and then the screen reverts to just steady state again.
(I have tried shutting down the iPad and then relaunching after a few minutes but to no avail; it still won't launch!! 
I delete the app. I close the iPad. I open and re-install from App Store. Then there is the long download process as the app downloads many (but not all) of my resources.
The app then works fine for a while before it refuses to launch.
What is happening? Is my iPad too long in the tooth? It's a model one running iOS 5 (because iOS 6 won't install on my iPad, because it isn't intend to.
This is only an issue with the Logos app; everything else works fine. FYI I have no notes, no highlights, no reading plans.
So, should I just give up on Logos for iPad and squint at my iPod Touch 4 which is running iOS 6 and on which the Logos app works fine, or invest more in my Laridian PocketBible which I have had since my Palm 5 days and which runs easily?
Suggestions/help please. 
Every blessing
Alan