Not sure if this has already been posted but i wanted to share. I have struggled a lot for just the right frequency of white noise to completely mask my tinnitus while I work at my computer during the day. Most of them out there don't do well with my brand of tinnitus. I finally found one that does and it works on mobile devices. Check it out. Its great for someone like me who works most of the day from a PC.
http://playnoise.com/
Glenn
http://playnoise.com/
Glenn