I would give calm 5 stars. The only thing that is keeping me from giving it 5 stars is that the website does not have a search functionality like the app does. It would be so much better if I could search for meditiation rather than browse through the list of meditations. It is nice to listen to the meditations on Calm before I start work in the morning, but I just wish that they could allow users to search for meditations on the website.