Ultimate Guitar mobile site is designed to NOT fit to your screen, even in landscape. When you scroll left-right, a message pops up offering a fit-to-screen feature in the fucking app. :
Best Apps for Guitar Tabs for beginners: Android and iPhone (iOS) - H2S Media
Ultimate Guitar Tabs Update 1.7.0 | Music News @ Ultimate-Guitar.Com
Ultimate Guitar - Spotify Connector. Find Tab / Chord From Your Current Spotify Track. - Ultimate Guitar