First Alert by Resideo

Resideo Technologies, Inc.

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.

Ratings and reviews

garbage. does not work on pixel 8, had to use iPad. tedious to activate the smoke detectors, still can't get them to show up in the home or nest app. update 3 months after they were installed I'm getting a low battery warning. hopefully it's just the cheap made in China batteries and not a defective detector. $125 each and supposed to last for 10 years.

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.

I open the app and it only shows links for Profile, Sign-in & Security, Privacy & Data, and Terms & Conditions. I can find no way to Add Device. This is Worthless. Edit: (Android) when you open the app for the first time, it actually opens in the browser. There is a small option that says open using the app. As far as I knew, I WAS already using the app! Uninstalled/reinstalled and choose that option. It worked fine after that. Adjusting from 1 star to 4 stars for the poor design.

What’s new

• Introduced a bug fix for thermostat vacation scheduling into 2026.
• Fixed an issue where some users experienced an intermittent pink screen on the dashboard.