We only use your current location, we don’t keep a history of your location or movement and we don’t provide data to any third parties. 

We identify your device using a unique code for the app and device, and we are not provided with any of your personal data, nor do we link any personal data with the code, so your privacy is not compromised.

We also 'fuzz' your location, as we don't need to know exactly what house or building you are in, just the general location to within a few hundred meters.

In other words we know there is a device around a certain location, but we don't know who they are or where they have been. And we don't tell anyone else.