résultats d'une étude menée par des chercheurs français sur 2146 applications gratuites du google play store:
"""
The conclusion is devastating. About 10% of all tested apps connect to more than 500 distinct URLs with the top applications all connecting to more than 1000 distinct URLs each and about 100 top level domains.

About 33% of apps don’t connect to ad-related sites while the remaining applications connect to an average number of 40 ad urls (some to more than 1000) with Google owned sites at the top.

About one quarter of apps communicate with tracking servers. Some connect to more than 800 different trackers.
"""