Can I suggest you take a look at Guitar Toolkit though (sadly, one you pay for) - I use it and i love it!
Works for a variety of stringed instruments, not just guitar, and of course, ukulele. I do play guitar too so this works for me.
has metronome, tuner, chord libraries, chord finder, scales - you name it!
For something completely different, I am now trying My Songbook app on the iphone - very cheap app, that connects with Chordie and the like to save songs and chords to your phone. Handy (I think) though the small screen is a bit of an issue if you are planning to play along to it.
Not sure yet...