You have to make a trade-off between simplicity and user expectations though. For example, 6 months before the iphone was released we developed a mobile app at

You have to make a trade-off between simplicity and user expectations though. For example, 6 months before the iphone was released we developed a mobile app at my work that was universally compatible. It ran on the lowest WAP2 phone you could imagine, by virtue of not using any javascript, using nothing that wasn't in the XHTML basic standard, and putting few controls on each screen. And then the iphone happened and our users very vocally told us that the look and feel of this app was not acceptable. So, we built a version that runs only on modern smartphones and a very narrow range of browsers, but users are ecstatic about it, even though it does exactly the same things as before.