App that passively detects when you enter a restaurant and vibrates to give you the hygiene rating. You can also pull your phone out for much more onscreen info.
Detects location using GPS and movement by accelerometer (if range of gravitational force values over a second exceed a certain threshold)
API up at http://nhtg14.harryrickards.com/api.
e.g. http://nhtg14.harryrickards.com/api/ratings?lat=52&lng=0.15