OnStar Guardian is a free safety app developed by OnStar LLC for Android users. The app offers key OnStar safety services, including crash detection, roadside assistance, emergency services, location status, and more. It is a simple way to ensure your family's safety, with mobile crash response, roadside assistance, and emergency services availablePlus, you can share these benefits with up to 7 family members at no additional cost. The app is available to OnStar Safety & Security Members as part of their plan, and non-GM vehicle owners can try it for up to 3 months for free. After that, it costs $15 per month.

The app's family locator feature offers departure and arrival notifications, a live map, and more, providing togetherness even when apart. The app is designed to work with select Android devices and is intended for use in select vehicles only. The service coverage and functionality vary by device and software version. OnStar Guardian service plan, cell reception, GPS signal, and device data connection are required for the app to operate properly. Limited voice commands are available, and device permissions are required for the app to function correctly. The app links to emergency services, and the device and app may not transmit all crash data.