10 Best Smart Smoke Detector

The X-Sense Wi-Fi Combination Smoke and Carbon Monoxide Alarm offers reliable dual detection with photoelectric smoke and electrochemical carbon monoxide sensors in one slim device, making it a convenient choice for home safety. Its standout feature is the clear English voice alerts that announce the exact location of danger, helping you react quickly during an emergency. The alarm connects directly to your phone via Wi-Fi, without needing a separate base station, allowing you to receive real-time updates on battery status, silence mode, and tests through the X-Sense app. You can also share control with up to 12 family members, which is handy for ensuring everyone stays informed.

The device runs on included replaceable lithium batteries designed to last up to 10 years, matching the alarm’s expected lifespan. Installation is straightforward thanks to its battery-powered design, so no complex wiring is necessary. A notable drawback is that these units do not interlink with each other, meaning if one detects smoke or CO, others won’t sound an alert — they operate independently. This might be a limitation in larger homes where multiple alarms would ideally communicate. Also, delivery restrictions may apply outside mainland UK.

Featuring a loud 85 dB alarm and a modern, unobtrusive look, this product is suitable for most homeowners wanting a smart, easy-to-use alarm system that covers both smoke and carbon monoxide detection without the need for extra hubs or base stations.

The FireAngel Pro Connected Smart Smoke Alarm is a reliable choice for home safety, using Thermoptek Technology to quickly detect various types of fires. It operates primarily on your home's mains power, which means you won't have to worry about frequent battery changes. However, it includes a 10-year backup lithium battery, so it still works during power outages. This alarm can wirelessly link with other FireAngel Pro devices, including smoke alarms, heat alarms, and carbon monoxide detectors, making it easier to cover your entire home and get alerts from multiple points.

For added convenience, it can connect to a gateway and app that notify you on your smartphone or via email, helping you stay informed even when you're away. Installation is flexible, allowing wall or ceiling mounting, and the device is made from fire-retardant materials for safety. It comes with a 5-year warranty and meets safety regulations for homes in Scotland, England, and Wales, though delivery may be limited outside mainland UK.

Its coverage area is solid at 35 square meters per unit, which means you might need more than one for larger homes. Some users may find that relying on mains power requires professional installation or checking your home's wiring. This alarm is suited for homeowners looking for a smart, interconnected system with long battery life and reliable fire detection, but those wanting a fully battery-operated or portable solution might want to explore other options.

The Google Nest Protect is a wired smart smoke and carbon monoxide detector designed for home safety with advanced features. It uses split-spectrum smoke sensing technology, which helps it detect both fast-flaming and slow-smoldering fires, plus a 10-year carbon monoxide sensor for reliable poison gas detection. Being wired, it provides consistent power without frequent battery changes, but it also includes 3 AAA backup batteries to keep it running during power outages.

One of its strongest points is the smart connectivity: it sends alerts directly to your phone if smoke or CO is detected, or if the batteries are low, allowing you to stay informed no matter where you are. The unit also offers voice alerts describing the danger and its location, and features like Pathlight—a soft light that helps guide you in the dark—and Steam Check to avoid false alarms from steam in bathrooms. Installation is straightforward, with a simple mounting plate and easy setup through an app on iOS or Android devices. However, since it’s a wired model, installation might require some electrical work, which can be tricky for those unfamiliar with wiring.

This detector is packed with thoughtful smart features and frequently self-tests itself, though its price is typically higher than many basic smoke alarms. It is ideal for homeowners seeking a connected, reliable, and feature-rich option who don't mind the wired installation. If you want a detector that's easy to relocate or install without wiring, a battery-only model might be more convenient. But for peace of mind with detailed alerts and long-term sensors, the Nest Protect is an excellent choice.