US Patent 10235022 Native application collaboration

A secondary device receives presence information for a content item that is synchronized by a content management system with the secondary device and with a primary device. If a user of the primary device is present as indicated by the presence information, a collaboration element is displayed on the secondary device. Responsive to a user input at the collaboration element, a collaboration request is sent to the primary device, and collaboration information enabling collaborative interaction with an instance of the content item on the primary device is received.