Meet the Pearl People Counter: a WiFi connected system that combines with your smartphone to let you know how many people are coming and going at your place of business. It connects to your network and can handle entrances up to 15ft wide.
The Pearl works as a pair of two sensors that create a dual beam signal to capture going and comings. The data is sent to the cloud for access on your iPhone or Android device. The companion app lets you monitor multiple Pearl systems.[where to get it]