CITIZEN Eco-Drive W770 is the official app for the "CITIZEN CONNECTED Eco-Drive W770" watch. By syncing the watch with the smartphone app, users can receive notifications for incoming calls, messages, and app notifications via case vibration, sound, and watch hands movement. Additionally, users can link the app with the IoT platform service "Riiiver" to customize watch buttons for personalized functions with a single push.

The app may access the device's location information in the background depending on the selected functions, even when the app is closed. For more details about data collection and usage, users can refer to the app's Privacy Policy.