iOS Web Apps and iOS Safari's Cache

[mathfantasia]

So I think I did everything right as far as making a very simple web app. It is hosted at http://test2.mmaatthh.org and when I am offline everything is totally saved and works as planned, but when I am offline and then clear Safari's Data and Cache, my web app is dead in the water. I was wondering if this is Apple's design for security (unsigned web apps causing trouble suddenly disappear when you clear iOS Safari Data and Cache). I was also wondering if anyone else had tho problem. This kind of makes me want to not make web apps that require the storage of data if the Safari "Clear Data" button includes clearing say a list of things. I have thought of a work around which is to store all user data in my web server's "cloud," but then I'd have to worry about security and passwords. Anyway, such is my dilemma.