A few days ago, SoniControl app reached 20 000 downloads on Google Play Store. Six months after its launch, our app is used in more than a hundred countries to fight against unwanted ultrasonic tracking. The goal of raising awareness seems to be achieved at least in the German-speaking countries and most people we saw this year at Ars Electronica Festival were aware of the problem.
If you did not try the first ultrasonic firewall yet, you can get it for free on the Google Play Store: https://play.google.com/store/apps/details?id=at.ac.fhstp.sonicontrol
A direct download link is also available on our website: SoniControl.apk