What is footfall analytics?
Definition
Footfall analytics counts the visitors entering a venue and describes how they behave: new versus repeat visits, how long they stay and how they move between zones. WiFi-based footfall analytics uses the access points already installed, needs no cameras and works with anonymised device data.
Footfall analytics explained
The data pipeline starts at the access point. Devices with WiFi switched on send probe requests as they search for networks, and APs record them with their signal strength. The analytics platform turns those observations into unique visitor counts over a period, positions devices using RSSI, and adds authenticated sign-in data where guests have connected.
Operations teams use the baseline count to judge how busy a venue is, plan staffing and measure the physical effect of a marketing campaign. Combined with dwell time and zone data, it shows which areas draw people in and which they walk past. Retailers add capture rate, the share of passers-by who come in, by pairing WiFi data with an entrance counter.
Accuracy and privacy need care. MAC randomisation on modern phones inflates unique counts unless the platform accounts for it, and device identifiers are personal data under GDPR, so analytics must use anonymised or consented data with a published retention policy. Handled properly, it turns the WiFi network from a cost centre into a source of operational intelligence.
Need more than a definition?
Talk to our team about how Purple combines guest WiFi, captive portals, RADIUS, and analytics into a single platform that runs on the access points you already own.