I had done mine. I have a rule of thumb... Once I download something, if I like it, I buy it. I hate limited games or ones with adds, so I will DL a version that is happy to be on my phone and give it a go. If I don't like it, it gets deleted. If I like it, it gets bought. Spent close to 400.00 on games and other things on Itunes, so its not like I dont follow through!
Have fun!