What apps are useful for tinnitus?

I did a Widex trial about 3 yrs ago and tried out the Zen fractal tones - they were LOVELY! It would be interesting to see if playing a competing, low volume tone would have any impact on my constant, 24x7 tinnitus tone!

Hey, I just surfed up to this site with a keyboard simulator, and find that my tinnitus appears to be the G4 key, LOL!