SOS Kiosk is a free Android application developed by SignOnSite. It falls under the Business & Productivity category and is designed to help workers sign on and off their respective SignOnSite site, even if they don't have the SignOnSite app installed on their phone.

The app allows site managers to log in to the kiosk and lock it to their site. They can also set a briefing that workers must acknowledge before signing on. On the other hand, employees can register kiosk accounts, sign on and off their site using these accounts or their existing SignOnSite app accounts, and view the site's briefing.

It is important to note that a SignOnSite site manager account is required to use this app. Overall, SOS Kiosk is a convenient way for workers to sign on and off their site without having to install the SignOnSite app on their phone.