Without going to the Apple AppStore, you can use YEL outside your Safari browser.
How? From the YEL site (http://yel.me), use the ’Action/Arrow’ button on your mobile Safari browser. (On iPhone, the bottom task bar, on iPad the top naviagation). Then click the 2nd option ‘Add to Home Screen’ (Toevoegen aan beginscherm). And continue. You can now drag/drop (hold the icon for 3 seconds) to your favourite location.
Hence YEL is a HTML5 webapp. (Appstore / Android Market plans are made), it will always stretch to 100% fullscreen. And easy to use on new large tablets.