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Get Key OnStar Safety services that give you help in a crash, assistance when you have car trouble and much more — right on your smartphone. For 25 years, OnStar® has led the way with on-the-road safety and security. The OnStar Guardian™ app carries that power beyond the vehicle: the power of OnStar on a smartphone — for every member of your family.

OnStar Safety & Security Members receive the OnStar Guardian app as part of their plan. If you don’t own a GM vehicle, you can try it for 30 days, and after that, it is only $15 a month.

Plus, you can share these benefits with up to 7 loved ones at no additional cost.


Mobile Crash Response
Help in a crash — even if you or your loved ones can’t ask for it. The Guardian app is designed to use your smartphone’s sensors to detect a crash and alert an Emergency-Certified Advisor. The Advisor will call your phone and can contact First Responders and provide them with your location, all while staying on the line with you until help arrives.

Roadside Assistance
Your loved ones can get a tow, a battery charge, help with a flat tire or have their doors unlocked. They can even get fuel if they run out of gas.

Emergency Services
The red Emergency button gives your family access to an Emergency-Certified Advisor 24/7. They can assess a situation, contact 911 and stay on the line until First Responders arrive.

Location Status
View and share locations with any family member you add to your plan — right in the app.

Visit onstar.com/guardian to learn more.


OnStar Guardian app: U.S. and Canada only. Available on select Apple devices. Mobile Crash Response services are intended for use in select vehicles only and will not connect automatically. Service coverage varies with conditions and location. Service availability, features and functionality vary by device and software version. OnStar Guardian service plan (standalone plan, add-on plan or plan that includes the service), cell reception, GPS signal, and device data connection required. Terms apply. Device permissions are required for app to operate properly. OnStar links to emergency services. Device and app may not transmit all crash data. See onstar.com https://www.onstar.com/us/en/guardian-app/gm-owner/ for details and limitations. Pricing and availability subject to change. You may cancel at any time by calling 1.888.4ONSTAR (1.888.466.7827).

Guardian Subscription with 1 Month Free: Offer available in the U.S. and Canada only. Must associate and maintain an approved payment method with your account and authorize recurring payments. First month is at no charge; thereafter, OnStar will automatically bill your payment method at the then-current standard rate (currently $15/month plus taxes and fees), discounted to $5/month plus taxes and fees for OnStar members with a paid Connected Services plan (excluding Hands-Free Calling, Data, and Navigation add-ons). You may cancel at any time by calling 1.888.4ONSTAR (1.888.466.7827). May not be combined with any other offers or retroactively applied. Offer subject to change.

OnStar Emergency-Certified Advisors: Certified by the International Academies of Emergency Dispatch®.

Location Status: Service is designed to locate compatible smartphones with Location Services permission enabled. Functionality varies by mobile device and plan. Data rates may apply. Terms and limitations apply. See onstar.com https://www.onstar.com/us/en/guardian-app/gm-owner/ for details and limitations.

Roadside Assistance: Roadside service provided by Allstate Roadside Services for vehicles only. Limitations and restrictions apply. Towing services have additional fees.

My Family: Up to seven additional individuals can be added to the “My Family” section within the app.

What’s New

Version 2.3

*Misc. Bug fixes
*Added support for non-GM owners in Canada to subscribe

Ratings and Reviews

4.6 out of 5
1.3K Ratings

1.3K Ratings

MusicalHigh ,

Great app

When I’m home I turn off the Location feature in the app to save my battery. I was getting frequent messages telling me to turn Location service back on, which was annoying. I put that in a review and the developer contacted me quickly. They asked me to uninstall the app and reinstall it to get the most current version. I did and that solved the problem. Now I can turn off Location tracking and I haven’t gotten any messages to turn it on. Thanks so much!

Developer Response ,

That's great to hear! Our team is glad that your concern was resolved. ~Makayla

randomness3213355 ,

Beware! Major Privacy issues!

I received the email from OnStar my service package would this new Guardian app where I can add my family, share locations with them and be protected in case of an emergency. Sounds great, right? After I downloaded and setup our family of four I started getting notifications for someone named ‘rielly’. No one in my family of 4 is named rielly, and I can see them all listed in the app. No extra people. Yet when Reilly’s battery gets low or the turn on and off permissions I kept getting a notification. So I called OnStar. They said they opened a ticket but there was absolutely no way whoever this Reilly person is could see my, or my family’s location. Fast forward a little over a week to today.. guardian app notification on my Lock Screen that Reilly has viewed my location! So now whoever this person is now knows WHERE I LIVE!!! Spent another hour on the phone with OnStar to get my account on the guardian app disabled completely and they still have no idea who this person is. Deleted all my family members and removed all location/microphone/tracking permissions. Made everyone else delete the app. Now at 1am, I get more notifications that Reilly’s phone is 7% and that “a family member has asked to view my location “. Yet everyone else in my house has completely deleted the app and I have turned off all permissions. This is awful - now I have to worry about someone stalking us. DON’T USE THIS APP!!!!

Developer Response ,

Thanks for bringing this to our attention. We would be happy to look into this further for you on our end. Can you please email socialmedia@gm.com with "ATTN: Guardian App/randomness3213355"" in the subject line so we can assist? We look forward to hearing from you soon. ~Jessica

Fastashell@ ,


My wife was having problems with the app but it worked perfectly with my credentials. It also worked wonky with her credentials on my phone. The IT folks worked diligently and fixed the issue and both apps are working beautifully. My wife’s review is lilcle80. So please understand that issue is fixed and we love the app!!!!

Developer Response ,

Thank you so much for the positive feedback! We're glad to see your concern has been resolved. ~Makayla

App Privacy

The developer, OnStar, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Health & Fitness
  • Financial Info
  • Location
  • Contact Info
  • User Content
  • Identifiers
  • Usage Data
  • Diagnostics
  • Other Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

  • Siri

    Get things done within this app using just your voice.

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