Cool:<p>> In contrast to a PDF viewer, a HINT viewer uses TEX's line breaking and page breaking algorithm to format the page you are currently viewing to fit the available size in the window or on your device.<p>Alas,<p>> iOS: Due to restrictions at my institutions, currently I can not offer a viewer in the Apple Store (which is however the long term goal). Instead, you can download a complete Xcode project which you can unpack, compile, and run on your computer: HintView_iOS.tgz.