The industry standard.

This app is an excellent mobile version of GP4 which is the industry standard for guitar tablature (and for a good reason). GP4 files and also some other file types can be opened in this app. I could even load some files which my GP4 desktop software failed to import. It also allows to write your own tabs, and the guitar specific techniques are excellent. The one big missing thing with this app is that it only allows one track to be edited, not several tracks. Also on my wishlist: more realistic sounding samples.

Kzyjones about Guitar Pro, v1.6.2