CBC News Marketplace had University of Calgary researchers and Privo scan six popular Canadian apps, finding the Tim Hortons app appeared to send device details to an overseas third party on launch, PC Optimum appeared to share searches and personal data with 10 outside companies, and the Weather Network appeared to send precise location and an advertising ID for targeted ads. Facebook appeared to collect metadata of unposted images while keeping data in-house, as did Amazon and YouTube, whose tests showed no targeted ads on children's content; the companies say they don't sell personal data, and Ann Cavoukian recommends users ask what is collected and delete unused apps.