html5 javascript local share limit question

Say an app on a page uses all 4mb. does this mean all other apps can’t use localshare anymore or is there a way to segment localshare based on app?

yes so therefore if you have multiple apps on one domain then one app could potentially take all the space… am I correct?

Yes.

The limit is on domain, not apps.
http://dev.w3.org/html5/webstorage/#disk-space