Force refresh cached app

Anyone have any idea how to I can force the user to reload/refresh the page so they clear their cache for the application? I am making frequent updates to our app and many users are not seeing the current forms and other page stuff because they are seeing the prior update. It's becoming an absolute customer support nightmare having every user seeing a different version of the app because we may update the app a few times per week.

I have this same challenge on iPads. When accessing my app but not in an iPhone? The has 1 iPad with three users, when a second user tries to logon The app freezes with a load screen that diesent complete! Works fine on a PC ?