A phone surveillance app called Spyhide is stealthily collecting private phone data from tens of thousands of Android devices around the world, new data shows. Once planted, Spyhide silently and continually uploads the phone's contacts, messages, photos, call logs and recordings, and granular location in real-time. Despite their stealth and broad access to a victim's phone data, stalkerware apps are notoriously buggy and are known to spill, leak, or otherwise put victims' stolen private data at further risk of exposure, underlying the risks that phone surveillance apps pose.