10 Best Smart Smoke Detector 2025 in the United States

The X-Sense Wireless Interconnected Combination Smoke and Carbon Monoxide Detector is designed to provide comprehensive safety for your home. Its main strength lies in the interconnected feature; when one unit detects smoke or CO, all interconnected units will alarm, ensuring that you are alerted promptly no matter where you are in the house. With the ability to connect up to 24 devices, this system can effectively cover larger spaces, making it a great choice for families living in bigger homes.

The smoke detector uses advanced detection technology, combining photoelectric and electrochemical sensors, which enhances its reliability in detecting both smoke and harmful CO levels. The informative LCD display is another plus, showing real-time CO levels and battery status, keeping you informed about the unit’s functionality.

On the practical side, the built-in 10-year battery is a significant advantage, removing the hassle of battery replacements during the lifespan of the unit. Installation is straightforward, as they are screw-in models and lightweight, weighing only 300 grams each.

However, this model does not support Wi-Fi, which may limit smart home integration for users looking for more advanced features such as remote monitoring via smartphone apps. If Wi-Fi connectivity is a priority for you, you would need to consider the alternative model, SC07-WX. Additionally, while the coverage per detector is decent, it is recommended for spaces up to 215-430 sq. ft., so you'll need to ensure adequate placement throughout your home for maximum protection.

The X-Sense Smart Smoke Detector and Carbon Monoxide Detector Combo stands out in the category of smart smoke detectors, particularly for households looking for a comprehensive safety solution. Its interconnected system allows multiple detectors to work together, ensuring that when one alarm sounds, all do. This feature is great for larger homes, making it easier to alert everyone in case of an emergency.

One of the best features is the app integration, which provides instant notifications when an alarm is triggered, along with alerts for low battery and system faults. You can even test or silence alarms through the app, eliminating the need for a ladder. Moreover, the ability to locate the source of the alarm through the app enhances user convenience significantly.

The battery life is another strong point, with a replaceable lithium battery designed to last up to 10 years. This long lifespan combined with the included batteries ensures that you won’t be constantly replacing them. The product does have some limitations. It's battery-operated and not AC hardwired, which could be a drawback for those who prefer hardwired detectors for uninterrupted power. Additionally, while the app functionality is excellent, users will need to set it up properly to fully benefit from its features. The optional Protect+ Premium subscription for 24/7 professional monitoring may be seen as an extra expense for some. Installation is user-friendly, but some may still find connecting multiple units a bit of a challenge.

The First Alert Smoke Alarm SMI100-AC 3-Pack is designed to provide reliable fire detection with a focus on reducing false alarms from cooking using its Precision Detection technology. This ionization sensor-based detector offers early warning to help keep your home safe. One strong point is its interconnect feature, which ensures that when one alarm sounds, all compatible units in your home will activate, giving you a clear and widespread alert.

The battery backup is another plus, providing continuous protection even during power outages, so you don’t have to worry about losing your smoke alarm’s functionality. Installation is made easier with the included Quick Connect Plug, which means you can set it up without rewiring your home’s electrical system. However, it's worth noting that these alarms do not offer Wi-Fi or app connectivity, so they lack remote alerts or smart home integration that some other smoke detectors have.

The unit uses standard 9V alkaline batteries, which are included, but they will need regular replacement to keep the alarm working optimally. Maintenance is relatively straightforward, especially with the visual alarm indicator that shows which alarm was triggered. This 3-pack is a solid choice for anyone wanting dependable, wired smoke alarms with battery backup and simple installation, especially if you prefer straightforward devices without the need for smartphone controls or complex smart features.