First Alert by Resideo

2.1
117 reviews
10K+
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
Aug 11, 2025

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

2.0
116 reviews
james mckeev
August 10, 2025
Worked fine for 1 month. Now I can't login to the app. After spending several hours on the phone with tech support. Worked fine on their end?? I still can't login to the app. I'm going to contact the contractor that installed my hvac & have the thermostat replaced with one that DOES NOT use the resido app. APP has a 2 star rating for a good reason, I wouldn't even give it that .
7 people found this review helpful
Did you find this helpful?
Resideo Technologies, Inc.
August 14, 2025
Hi james, We apologize for the inconvenience. We recommend updating to the latest version of the app (2.21.8)—this should resolve your Sign In issues. If you need more help, feel free to call us at 1-800-633-3991 or message us on Facebook at Honeywell Home. Thanks for your patience.
Mike
September 7, 2025
App has poor instructions for creating schedules. It does not indicate there are multiple modes for Away and Sleep and that you need to skip the first one to know that there are others. Needs to be a menu on the first screen displaying all choices in order to make a decision. Also, it would be really be nice to see, in the app, a way to EASILY know whether the system is CURRENTLY running. And the ability to change the room from the app. This is what the app is for!
Did you find this helpful?
Resideo Technologies, Inc.
September 7, 2025
Hi Mike, we're always looking for ways to improve the experience for our customers so we really appreciate the feedback. If you ever need assistance, contact us via social media and we'll be happy to help you.
Aidan Holmes
August 27, 2025
Same company behind the thermostat app and it went offline at the exact same time a day ago. The cause the stupid app or a third party.. they'll blame your wifi, your phone. you'll install, reinstall reset your wifi and nothing will work. meanwhile my 10 year old ring camera is still chugging along, zero issues and never randomly goes offline. Sidenote on this absolute junk. it'll send you motion notifications all day and all night for the same notification from 10 hours ago don't buy this junk
Did you find this helpful?
Resideo Technologies, Inc.
August 27, 2025
Hi Aidan, thank you for your review of the First Alert app. We are sorry that you feel this way. We will be happy to help making sure that the app and your device are working properly. Our tech support team is available 7 days a week at (800) 633-3991.

What’s new

Bug fixes to improve the app login experience