I use the Ultimate WW Diary and it is fantastic!! I have had it for about 1 1/2 years now
There is a meal maker which works like a recipe builder. You don't need to be a WW member to use it...it is totally independent
It is the only app I have ever bought for my phone and well worth it!! There is a big offline database of food and you can also use an online database when you can connect. I would highly recommend it
Ultimate Weight Watcher Diary on Android marketplace