# First Alert by Resideo

> Whole-home smart device management for safety, comfort, and leak detection. (iPhone/iPad app by Resideo Technologies, Inc..)

- Source: https://appshunter.io/ios/app/first-alert-by-resideo/id6457097692 (this page in markdown: same URL + `.md`)
- Developer: [Resideo Technologies, Inc.](https://appshunter.io/developer/1437524946)
- Category: Lifestyle
- Price: Free
- Rating: 4.80/5 from 25,072 App Store ratings · 426 written reviews indexed
- Age rating: 17+
- Requires: iOS 15.0 · 211 MB
- Languages: American English, Canadian French, Mexican Spanish
- Released: 2024-07-09
- Data updated: 2026-08-29
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/first-alert-by-resideo/id6457097692/reviews.md

## What is First Alert by Resideo?

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.

## Key features

- 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

## Chart rankings

- #49 in Top Free · Lifestyle (US App Store)

## What do users think of First Alert by Resideo?

Overall sentiment: negative

**Pros**

- 🚀 Functionality when it works
- 👍 Useful for smart home monitoring

**Cons**

- 🐛 Frequent crashes and login issues
- 🤯 Confusing and unintuitive UI
- 🔒 Privacy concerns with data collection
- 🔌 Compatibility issues with other smart home devices

**Commonly reported bugs**

- Sign-in button not functioning
- Delayed HVAC runtime data updates
- Inability to add new devices

**Most requested features**

- Option to switch between Celsius and Fahrenheit
- Improved remote sensor integration
- Apple Watch and landscape mode support

## Recent user reviews (10 of 426)

All indexed reviews: https://appshunter.io/ios/app/first-alert-by-resideo/id6457097692/reviews.md

### 3/5 — Works but bring back humidity reading

*2026-08-23, version 2.26.0*

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

### 1/5 — Humidity Reading

*2026-08-23, version 2.26.0*

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.

### 5/5 — Love the App

*2026-08-22, version 2.26.0*

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.

### 2/5 — Perpetually OFFLINE

*2026-08-22, version 2.26.0*

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”.

### 1/5 — Why remove indoor RH%

*2026-08-22, version 2.26.0*

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.

### 2/5 — Constant disconnection

*2026-08-22, version 2.26.0*

Thermostat continually disconnects from phone app forcing reinstall.  Frustrating

### 1/5 — Stop changing the app

*2026-08-22, version 2.26.0*

Resideo used to be something else. They changed the name and app , fine. Log in once in a long time and now it’s changed to First Alert. Whatever. Get signed into First Alert to get a notification that it will be a new app in a few weeks called Resideo Connect or something. Get a grip and stick with something.

### 5/5 — Easy to use

*2026-08-21, version 2.26.0*

Excellent and user friendly

### 1/5 — Sucks for a single device application

*2026-08-21, version 2.26.0*

It’s too busy for a single device application. I should be able to customize my dashboard. Get rid of the “Learn More” menu since I don’t need to “ learn more” with a single application. The app should be backwards compatible with the TCC app. Don’t like it.

### 1/5 — Sync issues

*2026-08-20, version 2.26.0*

Completed setup and will not sync

## Frequently asked questions about First Alert by Resideo

### 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.

## Version history (last 5 releases)

### 2.26.0 — 2026-07-30

• 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.

### 2.25.2 — 2026-07-16

Bug fixes

### 2.25.1 — 2026-06-17

Sign-In & Account: Enhanced authentication, session persistence, and account access to ensure you get in (and stay in) without a hitch.
App Stability: We have squashed a wide variety of bugs to resolve crashes, freezes, and loading issues, providing a much more stable experience.
Security & Safety: Improved reliability for arming/disarming, alarm-state accuracy, and status reporting for smoke, CO, and leak sensors.
Video & Cameras: Smoother livestreaming, improved clip playback, and more consistent activity visibility.
Notifications: Refined alert delivery so you receive important updates more reliably and on time.
General Usability: Cleaned up dashboard rendering, navigation paths, thermostat scheduling, and device management flows.

### 2.25.0 — 2026-06-10

Sign-In & Account: Enhanced authentication, session persistence, and account access to ensure you get in (and stay in) without a hitch.
App Stability: We have squashed a wide variety of bugs to resolve crashes, freezes, and loading issues, providing a much more stable experience.
Security & Safety: Improved reliability for arming/disarming, alarm-state accuracy, and status reporting for smoke, CO, and leak sensors.
Video & Cameras: Smoother livestreaming, improved clip playback, and more consistent activity visibility.
Notifications: Refined alert delivery so you receive important updates more reliably and on time.
General Usability: Cleaned up dashboard rendering, navigation paths, thermostat scheduling, and device management flows.

### 2.24.3 — 2026-04-22

Bug Fixes

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## More apps by Resideo Technologies, Inc.

- [Total Connect 2.0](https://appshunter.io/ios/app/total-connect-20/id439763870)
- [Total Connect Comfort](https://appshunter.io/ios/app/total-connect-comfort/id469517819)
- [Resideo - Smart Home](https://appshunter.io/ios/app/resideo-smart-home/id880332077)
- [Honeywell LCP500](https://appshunter.io/ios/app/honeywell-lcp500/id1010673009)
- [W Box VMS](https://appshunter.io/ios/app/w-box-vms/id1016289957)
- [Honeywell Smile](https://appshunter.io/ios/app/honeywell-smile/id1066758106)

All apps by Resideo Technologies, Inc.: https://appshunter.io/developer/1437524946

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*