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Best Smart Smoke & CO Detectors for iPhone (2026)
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Quick answer: A smart smoke/CO detector sends an alert straight to your iPhone when it goes off — so you know about a fire or carbon monoxide even when you're away. Get a HomeKit combo alarm for Apple homes, a Wi-Fi standalone for a single room, or a listener that makes your existing alarms smart for less. A combined smoke + CO unit covers both threats in one.
🏆 Best Overall — HomeKit Smoke + CO Alarm
★ BEST OVERALL
HomeKit Smoke & CO Combo Alarm
Smoke + COiPhone alerts
Detects both smoke and carbon monoxide, pushes alerts to your iPhone, and works in the Apple Home app. The pick for whole-home safety in an Apple household. Know instantly, wherever you are.
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📶 Best Wi-Fi — Standalone Smart Detector
★ NO HUB NEEDED
Wi-Fi Smart Smoke Detector
Direct to phone
Connects straight to Wi-Fi and your iPhone app with no hub — simple to add room by room. The pick for renters and single-room coverage. Self-test and low-battery alerts on your phone.
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💰 Best Value — Smart Alarm Listener
★ BEST VALUE
Smoke Alarm Listener / Sensor
Makes old alarms smart
Listens for your existing alarms and pushes the alert to your iPhone — smart safety without replacing every detector. The pick for keeping current alarms but adding phone notifications. Cheapest path to remote alerts.
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🔋 Best Battery — 10-Year Sealed Smart Alarm
10-Year Battery Smart Alarm
Sealed battery
A sealed long-life battery means no annual swaps, with app alerts and low-battery warnings. The pick for set-and-forget safety. No more 3am chirping you can't locate.
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Pro tip — interconnected alarms are worth it; one alarm sounds, they all do.
Choose alarms that interconnect so a fire in the basement sounds the bedroom alarm too — minutes matter. Replace CO sensors per the manufacturer's lifespan (often 7–10 years) even if they still beep, since the sensing element degrades. A smart alarm is a supplement to, not a replacement for, code-compliant detectors.
📦 iPhone Not Getting Safety Alerts?
Missed alarm notifications can be an iPhone Wi-Fi or notification problem. We offer mail-in diagnosis.
→ Mail-In iPhone Repair