I like the app but it's missing basic sleep info.I bought the lifetime subscription, and after emailing customer service I was told specifically what I was looking for (sleep efficiency) was available. It's not. After several emails of pretty speedy communication but then more and more vague answers, they finally stopped communication with me. The premium content is exactly the same as the free content which isn't bad for free but I want what I paid for and I'm not really sure what that is now