First Alert by Resideo

First Alert by Resideo

by Resideo Technologies, Inc.

25K ratings
426 reviews
#48 in free Lifestyle
🌟 Lifestyle
Free

Details

  • Released
  • Updated
  • July 9, 2024
  • July 30, 2026

Features

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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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What's New in First Alert by Resideo

2.26.0

July 30, 2026

• Critical Alerts: Smoke, CO, and security alerts now sound even when your phone is on Silent, Do Not Disturb, or Focus mode • Notification Controls: Choose which devices send you alerts. Easily mute notifications for cameras, sensors, thermostats, water detectors, or valves. • Water Monitoring Upgrades: View water temperature and pressure, set custom alert thresholds, and silence leak alarms directly from the app. • Security Panel Support: Link your TC2 Lyric, Lynx, or compatible panel and arm/disarm from the app with Arm Away, Arm Home, and Arm Night controls. • Faster Smart Locks: Improved communication with Kwikset locks for quicker, more responsive control. • Bug Fixes & Stability: Resolved issues with duplicate notifications, dashboard loading, thermostat sensor visibility, video clips, and more for a smoother overall experience.

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Charts

Top Free

📈 48+1

Lifestyle

This app rose +1 position in Lifestyle chart.

Last updated on August 29, 2026.

User reviews

Works but bring back humidity reading

Bring back humidity reading. This only stopped showing up at the latest update

Humidity Reading

8/23/36 update: You keep giving the same reply to the humidity reading not being displayed on the app anymore & what you’re suggesting is NOT the issue. We are all not able to see anything displayed for humidity. Not even the word humidity. We were able to before your last update at the beginning of August. Fix this bug via another update! It’s not our t stat settings, it’s your app & we shouldn’t have to call the 1-800 # to get this problem fixed that wasn’t a problem before.


The humidity reading has been completely removed from the main dashboard now. I’m not sure if this is a glitch or a permanent change but please bring it back.
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Love the App

I love the app, while I’m giving this 5 stars and it deserves all of them, they remove the relatively humidity reading and I’m not happy, I’ll hold this five star review as is in hopes they put it back in.

Perpetually OFFLINE

The new name for the app is weird, sounds like “Life Alert”. It should have been atleast relevant to thermostats! Also the wifi connection is EXTREMELY INCONSISTENT, it keeps losing connection and going offline, I literally renamed it “Dumb Thermostat”.

Why remove indoor RH%

I’m an HVAC contractor who recommended these thermostats to customers specifically because I could remotely view indoor humidity. Removing humidity from the app eliminated one of the most useful features for HVAC professionals. I personally own the thermostat, and this change is enough for me to switch to ecobee. More importantly, when customers ask me which smart thermostat I recommend, I’ll now recommend ecobee instead. Removing functionality from existing products isn’t an improvement. Please restore the indoor humidity reading. Went from 5 stars to 1 in just one update.
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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.