First Alert by Resideo

First Alert by Resideo

by Resideo Technologies, Inc.

22K ratings
326 reviews
With Ads#51 in free Lifestyle
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Details

  • Released
  • Updated
  • July 9, 2024
  • July 16, 2026

Features

First Alert by Resideo screenshot #1 for iPhone
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First Alert by Resideo screenshot #4 for iPhone
First Alert by Resideo screenshot #5 for iPhone
First Alert by Resideo screenshot #6 for iPhone
First Alert by Resideo screenshot #7 for iPhone
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About

Monitor and manage your smart home devices for comfort, safety, and water leak detection. Receive alerts whether you're home or away, and integrate with various smart home partners for comprehensive control.

Whole-home device management
Real-time alerts (home/away)
Comfort control (thermostats)
Smart smoke & CO detection
Video monitoring (doorbell/cameras)
Water leak detection & shutoff
Smart home partner integration
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What users say

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+1

What's New in First Alert by Resideo

2.25.2

July 16, 2026

Bug fixes

Charts

Top Free

📈 51+3

Lifestyle

This app rose +3 positions in Lifestyle chart.

Last updated on July 19, 2026.

User reviews

Mickey Mouse

The display looks like was created by an amateur designer. It does not display when cool is running only “cool is on” which displays that the cool is set not that it is running. Prior app displayed when cool or heat is actually running. Will be replacing with a different brand.

Great Thermostat App but (Needs Dark Background Mode)

Great app as I am coming from Google thermostat platform. An improvement can be adding the use of a dark background mode to make it look aesthetically pleasing.

Need Celsius units!!!

Just installed the app for my new HVAC system and there is no unit in Celsius only Fahrenheit!? I use to have the other Resideo app and everything was ok I could choose the units I wanted…

Other than that so far app seems fine, will see with more usage.

Horrible

Doesn’t work, not on iPhone or Mac.

Absurd requirements

The app will not connect without being granted an absurd amount of private information and data access. There is absolutely no reason that full gps location access should be required to connect to a device on my local network. Nor should the company need my complete address to allow me to use my device. Unable to use the app, my “smart” device is pretty dumb and i will return my Honeywell device for a cheaper model or one with more reasonable data requirements.
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Developer apps

User experience

🐞

Reported Bugs

3 issues

Sign-in button not functioning

Bug

Delayed HVAC runtime data updates

Bug

Inability to add new devices

Bug

Requested Features

3 requests

Option to switch between Celsius and Fahrenheit

Feature

Improved remote sensor integration

Feature

Apple Watch and landscape mode support

Feature

FAQ

What does the First Alert by Resideo app do?

The app allows you to monitor and manage a variety of smart home devices, including video cameras, smart smoke and carbon monoxide alarms, smart thermostats, and water leak detectors. It provides whole-home coverage and alerts whether you are at home or away.

What are the key features of this app?

Key features include whole-home coverage for managing various smart devices, real-time alerts for incidents like water leaks or smoke, comfort control for smart thermostats, smart smoke and carbon monoxide detection, video monitoring, and water leak detection with optional shutoff capabilities. It also integrates with smart home partner devices.

Is the First Alert by Resideo app free to use?

The app itself is free to download and use. However, it is designed to work with specific First Alert, Resideo, and Honeywell Home branded smart devices, which are purchased separately. There may also be in-app purchases for additional features or services.

What devices are compatible with the First Alert by Resideo app?

The app is compatible with select Resideo, Honeywell Home, and First Alert branded products, including video cameras, smart smoke and carbon monoxide alarms, smart thermostats, and water leak detection devices. It also integrates with smart home partners like Schlage, Kwikset, and Genie, and can integrate with Google Nest Protect Alarms.

How can this app help prevent home damage?

The app helps prevent home damage through its water leak detection feature, which alerts you to leaks early. It also offers a Water Shutoff Device that can be professionally installed to automatically turn off your home's water supply when a leak is detected, minimizing potential water damage.