I think it's so wierd. They show this blue bar line going way the hell to the right (Whoa! 8 Weeks!) and then underneath it says when used for 30 minutes per day.
So ... correct me if I am wrong but 30 minutes per day for 8 weeks is 28 hours of use. That's only twice what it is showing Smartphone as, not 15 times.
Anyway, it's still more than enough, just pointing out the geniuses about marketing.
As Twain said "Lies, Damned Lies, and Statistics!