Cloak is an app for Macs, iPhones, and iPads that helps keep you safe online. When you use a public network, you broadcast your activities to everyone else using the network. Someon e might decide to listen in. Hacker tools make it easy to take malicious advantage of your leaky data. Cloak is designed to protect you from security threats when you’re using untrusted and public networks, like at coffee shops, airports, hotels, and conferences.