Zoosk is an app that learns as you click in order to pair you with singles with whom you’re likely to discover mutual attraction. Zoosk’s Behavioral Matchmaking™ technology is constantly learning from the actions of all members in order to deliver better matches.
This mobile app is a social news aggregator that has recommendation engine and adaptive representation features based on your interests (in user profile). It collects implicit feedback from user interaction with the app and integrated this information o user profile.
H. Chen, D. Niu, K. Lai, Y. Xu, and M. Ardakani. Proceedings of the 25th ACM International on Conference on Information and Knowledge Management, page 669--678. New York, NY, USA, ACM, (2016)