Yes, use of a mobile device is required for Revian Red. The Revian Red cap is controlled by the free Revian app that must be downloaded from Google Play or the Apple App Store and installed on an Android or Apple (iOS) mobile device that has a camera, Wi-Fi or mobile network connectivity, a touchscreen, and Bluetooth.
The Revian app is used to start and pause treatments, track progress, and set treatment reminders among other things.