  In this paper we present a platform which is usable by novice users without
domain knowledge of experts. The platform consisting of an iOS app to monitor
network traffic and a website to evaluate the results. Monitoring takes place
on-device; no external server is required. Users can record and share network
activity, compare evaluation results, and create rankings on apps and
app-groups. The results are used to detect new trackers, point out misconduct
in privacy practices, or automate comparisons on app-attributes like price,
region, and category. To demonstrate potential use cases, we compare 75 apps
before and after the iOS 14 release and show that we can detect trends in
app-specific behavior change over time, for example, by privacy changes in the
OS. Our results indicate a slight decrease in tracking but also an increase in
contacted domains. We identify seven new trackers which are not present in
current tracking lists such as EasyList. The games category is particularly
prone to tracking (53% of the traffic) and contacts on average 36.2 domains
with 59.3 requests per minute.
