For me it's just not worth it to create an account for 7 sessions. And paying is not an option either, after using it quite successfully for 1-2 weeks I am still not convinced to drop 7$ a month on it. As a college student that is a lot of money. With those 7 sessions it is not possible to estimate whether the app can actually create a lot of different sounds or not. With intense focus I have been through all of them I think and it was like 10-15 30 minute sessions. Nothing to spend money on.