I access the fitday website on my droid x and it works great - all the dropdown boxes work well. I use it all the time. I do pay for it, so I don't have the ads, but I don't think that would make a huge difference. I don't see the need for an actual app.
Height: 5' 5.5"
Started Fitday 9/3/2010 - 180.6
Current Weight 12/6/10: 162