Just download and try it. As I said, there is no financial risk at all. Trust me it's a lot of fun. By deleting your pictures, you get prizes and make the little hamster happy, after you sorted out enough photos. With the little nuggets and diamonds, you get, you can choose Hall of Fame pictures and share them with your friends on Facebook for example. I also use the app in other ways besides getting more disk space on my phone. On their facebook page they recommended to take pictures of the things you want to buy with the money you got for Christmas and then sort out which ones you want less. I think that's also a very usefull purpose to make use of the app. ;-)