First Alert by Resideo

4.6
1.33K reviews
50K+
Downloads
Content rating
Everyone
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About this app

Take control of your home’s comfort, safety, and water leak detection with the First Alert app. Whether at home or away, this whole home solution lets you monitor and manage your smart home devices. Powered by our family of brands, the First Alert app is compatible across select Resideo, Honeywell Home and First Alert branded products. Plus, integrate with smart home partners to control additional devices in your home. Start connecting to what matters most with the First Alert app.

• Whole-Home Coverage: Manage video, smart smoke & carbon monoxide alarms, select smart thermostats, and water leak detection in one intuitive app.
• Alerts Whether Home or Away: Receive alerts for water leaks, motion, smoke or CO incidents and more, so you’re always connected.
• Trusted Brands: Powered by select Resideo, Honeywell Home and First Alert devices for reliable, trusted performance.

Key Features
• Comfort Control: Manage select Honeywell Home smart thermostats, set schedules, enroll in energy-saving programs to help save on utility.
• Smart Smoke & Carbon Monoxide Detection: Fire safety you trust is now connected and compatible. Add smart fire & CO safety alerts to your home and stay connected whether home or away. Plus, seamlessly integrate with existing Google Nest Protect Alarms* in your home to expand your safety ecosystem or if it’s time to replace.
• Smart Home Awareness Video Offering: Stay connected to First Alert Video Doorbell and Outdoor Cameras with advanced event detection for improved event information (people, pets, vehicles, packages) and notifications.
• Water Leak Detection: Water leaks can happen, and the First Alert WiFi Water Leak and Freeze Detector helps detect leaks early and help prevent damage. Plus, our Water Shutoff Device can be installed by a professional to shut off your home’s water supply when it detects water via the sensor cable or paired with the WiFi Water Leak and Freeze Detector.
• Smart Home Partner devices: Now control additional devices including Schlage smart locks, Kwikset smart locks and Genie garage door openers for ultimate convenience in one app. Plus, integrate with the leading Smart Home Platforms for the ultimate convenience and control.

Expand your home’s protection with our whole home offering. Learn more about our family of connected smart products at Resideo.com/FirstAlertApp
• New to our brands? Download the app and easily add devices with a guided setup.
Updated on
Feb 5, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, App activity and 2 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.6
1.31K reviews
Chuck Chuck
February 4, 2026
Suddenly stopped working on my Samsung S10. App support stated that the app was not compatible with my phone. This is a ridiculous answer as the app was working perfectly and suddenly stopped. If it was not compatible, the app store would not allowed it to be downloaded. I tried all the available solutions but the app refuses to load as it loops back to the sign in page when trying to load. Very frustrating.
Did you find this helpful?
Resideo Technologies, Inc.
February 4, 2026
Hi Chuck, thank you for bringing this to our attention. We will be happy to verify the compatibility of the app and your phone's Android version and help troubleshooting. Feel free to contact our tech support team at (800) 633-3991.
Peter Blanas
October 24, 2025
it seems like a decent enough, user friendly app. MY ISSUE: Doesn't work (can't 'add device') with my existing Honeywell Home stats, even though they're the same co. Had I known this upfront, I would not have purchased their new tstat. now I get to use 2 different apps, to control 2 Honeywell Stats, at the same location. decent enough app and stat, but really poor product integration.
5 people found this review helpful
Did you find this helpful?
Resideo Technologies, Inc.
October 24, 2025
We are sorry to hear about the inconveniences, but we will be happy to help. Please give us a call at 1-800-468-1502 and one of our agents will be happy to assist you setting up the thermostats!
Dave Mchugh
October 18, 2025
this app was working , I accidentally logged out, and that was the last time I was able to use it 3 weeks ago. I get an error that it's not optimized to run on android. I reached out to support. but nothing. do your self a favor and buy something else. update 10.13 - still unable to use the app, called support and emailed. still nothing, all apps are updated, phone at the latest version.
8 people found this review helpful
Did you find this helpful?
Resideo Technologies, Inc.
October 18, 2025
Hi Dave, if you’re still experiencing this, we would be happy to assist you. Please feel free to reach out to us on Facebook with a private message for support. We look forward to hearing from you soon.

What’s new

Introducing Total Connect 2.0 integrations to arm/disarm First Alert Pro Series Security Panels
New user management functionality for Family & Friends and Service Providers, with clearer invites, access, and privacy
Improved reliability for V-series cameras, including smoother Live View and more dependable clip viewing and sharing
Miscellaneous performance, stability, and bug fixes