Can anyone recommend a good Scrabble-style iPad game ?

My Mum plays Words With Friends (*) and I can't believe what an absolute eye-sore it is! Not to mention the fullscreen video ads every couple of minutes!

So before she parts with a fiver to remove the ads, we've also tried:

- Wordfeud - looks much less busy, more like real Scrabble, and 

- Word Chums - I like it, but too cartoony for my Mum. Looks and plays very slick, though.

Both of these still have occasional fullscreen video ads in their free versions. Any others without ads at all?

(*) - looks like all players have been forced over to v2 of the game, a new app download. But for some reason we are unable to login (via FB) and all previous games and friend connections have been lost. Hence the reluctance to pay a fiver!