has a history of being spyware. I don't know if I still is, because I wouldn't touch I with a 10-foot pole... but if it's advertising-sponsored you should view it as a security risk in any event. Almost all ad-serving apps are key-loggers to detect your activity (so I can deliver targeted ads), and many legitimate ad servers have been hacked and hijacked by spyware rings so the ads you view could carry a payload.