First Alert by Resideo

Review by eFreeware

Most smart home apps ask you to pick a lane: cameras here, heating there, a separate screen for the smoke alarms. First Alert, from Resideo Technologies, is built around the opposite idea. It pulls safety, comfort, video and water leak detection into a single place, provided the hardware on your walls comes from the right family of brands. That is the most distinctive thing about it, and it shapes almost everything else.

The app is free to download, carries no ads, and offers in-app purchases. It sits in the Lifestyle category on Google Play, has passed 100,000 installs, and holds a 4.5 average from roughly 5,900 ratings. It first appeared in June 2024 and was last updated in September 2026 with bug fixes.

If your home already runs on select Resideo, Honeywell Home or First Alert gear, this is the app that ties those pieces together. If you are starting from scratch, the appeal is a single dashboard for the things you would otherwise check in three or four different places.

Households already living with these brands

The clearest fit is a home that has accumulated devices from these brands over time. Someone who bought a Honeywell Home thermostat a few years ago and has since added a First Alert alarm or a Resideo leak sensor is exactly the person this app is designed around. They get one place to check status and receive alerts.

It also makes sense for anyone planning a staged upgrade rather than a single shopping trip. The app covers video, smoke and carbon monoxide alarms, select thermostats and water leak detection, and it accepts partner devices too. That means a household can add a piece at a time and still see everything in one interface.

The other group worth mentioning is people who want safety notifications to reach them when they are not home. The developer describes alerts for water leaks, motion, smoke and carbon monoxide incidents, which is the sort of thing that matters most when the house is empty. Anyone who travels regularly, works long shifts or spends weekends away will see the point of that immediately.

What I would not expect is a good fit for someone who has built a home around a different ecosystem entirely and has no intention of buying into this one. The app is a hub for a specific catalog of hardware, and its value scales with how much of that hardware is present.

Safety alerts that follow you out the door

The core of the app is fire and carbon monoxide safety. Smart smoke and CO alarms connect to it, and the developer promises alerts whether you are at home or away.

There is also a notable accommodation for homes that already own Google Nest Protect alarms. The app is described as integrating with them, which lets a household fold existing hardware into the same safety view rather than replacing it. The developer frames this as a way to expand an existing safety setup or to bridge the gap when those alarms reach the end of their life.

I would treat this section as the reason to install the app at all. Comfort features are convenient, cameras are useful, but smoke and carbon monoxide monitoring is the part with real consequences, and it is the part the app is most clearly organized around.

Cameras that describe what they saw

Video doorbells and outdoor cameras from First Alert are covered too. The feature I find most interesting is event detection that sorts activity into categories: people, pets, vehicles and packages. Rather than a generic motion ping, the notification carries some idea of what triggered it.

That distinction is practical. A household that gets frequent deliveries will care about package events; someone with a dog that patrols the yard will care about pet events; and anyone living near a busy street will want to know when a vehicle is the cause rather than a person. Categorized events are a quieter benefit than live video.

The developer says detection gives richer event details. I would read that as the app's attempt to reduce noise rather than simply add cameras to a list.

Leak detection and the shutoff option

Water damage is the least dramatic hazard in a home and often the most expensive. Freeze detection is a sensible addition for anyone in a cold climate, since a burst pipe usually announces itself long after the damage is done.

A Water Shutoff Device is also available, installed by a professional. Water sensed by the cable or a paired detector triggers a shutoff. That is a meaningful escalation from notification to action, and it is the kind of feature that appeals to people who have already dealt with a flooded basement.

The professional installation point is worth noting because it changes the character of the purchase. This is not a plug-in accessory you unbox on a Saturday afternoon.

Thermostats, schedules and partner devices

For comfort, it works with some Honeywell Home smart thermostats. You can set schedules and energy-saving programs to lower bills. For a household that already adjusts heating and cooling by hand, scheduling is the obvious first win.

The app also reaches beyond its own brands. Schlage and Kwikset locks and Genie garage door openers can be controlled from the app, along with leading smart home platforms. The intention is clear: fewer apps, fewer places to look when you are trying to remember whether you locked the door.

This is where the app's ambition is most visible. Rather than staying a fire-safety utility, it positions itself as the control layer for a whole house, and the partner list is what makes that plausible.

What it costs and what the purchases are for

The app itself is free to download, and the developer's listing states that it contains no ads. That is a straightforward arrangement.

In-app purchases are offered. The app is the software layer for a range of hardware. The honest position is that the app costs nothing to install and the purchases exist, and anyone weighing the total expense should look at the devices themselves, since that is where the real money goes.

The hardware requirement is the practical cost here. A free app that needs a compatible thermostat, alarm, camera or leak detector to do anything meaningful is free in the way a printer is free. The shutoff device, in particular, involves professional installation, which is a further expense beyond the app.

How it compares with the alternatives

The closest alternative is not another app but a different approach: buying each device with its own companion app and accepting the clutter. That route gives you more choice of brands, at the price of checking several places and remembering several logins. It is a reasonable trade for a small home with two or three gadgets.

A second option is a general smart home platform that tries to speak to everything. Those tend to be broader but shallower on safety specifics. The First Alert app's advantage is depth within its own catalog.

A third path is a professionally monitored security service, which also brings a human response. It tells you what is happening and, in the case of the shutoff device, can take one specific action. Anyone who wants someone else to call the fire department is shopping in a different category.

My sense is that the decision comes down to hardware. If the compatible devices are already in your home or on your shopping list, the app is the natural center for them. If they are not, the app alone will not do much.

A hub worth having if the hardware is already there

First Alert is a well-organized answer to a real problem: home safety and comfort spread across too many screens. It covers smoke and carbon monoxide alerts, video with categorized event detection, water leak and freeze monitoring, thermostat scheduling and a handful of partner devices, all without ads and without a download fee. The 4.5 average from around 5,900 ratings suggests that households using it are broadly satisfied.

The conditions are worth stating plainly. The app is a controller for select Resideo, Honeywell Home and First Alert products, and its usefulness tracks how much of that hardware you own or intend to buy. The water shutoff device requires professional installation, which adds cost and coordination. In-app purchases are present.

For a household already inside these brands, or one planning to move into them, I would expect this to be the app that makes the whole setup feel like a system rather than a collection of parts. For someone with no compatible devices and no plans to buy any, there is little here to install for.

What's new in version 2.26.1

Bug Fixes.