If you have an iPad, you can get an idea for how it works: (or doesn't) Piascore for iPad has the feature. In my experience, it is clumsy at best. It tends to assume your head turn meant to turn the page forwards even if you turned your head the other way. It is a good proof of concept, though. FWIW
Sent from my Samsung Galaxy Note Pro 12.2 with Tapatalk
Sent from my Samsung Galaxy Note Pro 12.2 with Tapatalk