> I cannot give you a definitive answer on the back button
Webapps on ios7.1 are dramatically improved. But not perfect yet. I can share that on ios7.1 there appears to still be an issue with appcache and single page apps that use hash (#) navigation, e.g., back-button widget uses this approach. When device is in airport mode the back button navigation does nothing. I believe the immediate workaround is to convert the button to using a gotoScreen action. (I’ll check this out asap).
> same web app built with M1 version 2.3.2 installs fine, full screen, off line support on iP5
I can say why – don’t know. We have never been able to replicate any such level of success (we tried). iOS 7.0 broke webapp installations on homescreen and the app cache was total whacked. Older M1 2.3 apps were build for ios6 with an older api that it linked to. Just guessing but this could have some partial success bypassing some of the ios7 issues.