Monitor CO2, temperature, and humidity levels in real-time using a Bluetooth sensor. Save readings with location data and sync them across Apple devices via iCloud. View historical data on a map.






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With an average user rating of 4.0★, the carbon monoxide detector app category is one of the App Store's strongest. Browse all 0+ apps we track, sorted so the most loved ones surface first.






Monitor CO2, temperature, and humidity levels in real-time using a Bluetooth sensor. Save readings with location data and sync them across Apple devices via iCloud. View historical data on a map.






Check real-time air quality and pollution levels for your current location or any city worldwide. Understand the concentration of various pollutants and receive alerts for unhealthy conditions. Find protection equipment and manage respiratory health.







Monitor carbon dioxide levels remotely from your devices. Receive real-time readings and push notifications for unhealthy air quality. Optimize ventilation and know when to open windows for better air.


This app works with a smartphone-powered USB device to detect various gas leaks like methane and formaldehyde. It provides real-time monitoring and alerts to enhance safety at home or work. Pinpoint emission sources effortlessly for peace of mind.


Measure ambient CO2 levels using a compatible device. This utility app provides environmental data for your surroundings.


Access real-time and forecasted air quality data for over 500,000 locations worldwide. Understand pollutant levels, receive health recommendations, and track wildfire and pollen information to plan your day safely.


Control your smart home devices, including thermostats, security systems, cameras, and smoke detectors, all from a single app. Receive alerts, manage schedules, and automate actions based on your presence.


This app connects to smart home safety devices, providing real-time alerts for smoke, CO, air quality, and water leaks. It offers features like Smart Hush, remote notifications to loved ones, and advanced indoor air quality monitoring through a subscription service.


Turn your smartphone into a functional metal detector. This app uses your device's magnetometer to identify hidden metal objects with clear visual and audio cues. It offers a user-friendly experience with helpful features like dark mode.


This app uses a radar to detect paranormal spirits and ghosts in your surroundings. It offers a camera view for better visibility and allows for communication with detected entities without using your voice. It is intended as a prank application.


This app syncs with Bluetooth-enabled carbon monoxide monitors to view stored measurements and logs. It serves as a mobile companion for devices like the NSI 6000.




Monitor indoor air quality with a unified app for various sensor devices. Track CO2, temperature, humidity, atmospheric pressure, and radiation levels. Receive smart alerts and analyze historical data with easy-to-read charts.


This app works with a portable carbon monoxide monitor to provide real-time air quality data and safety alerts. It displays CO levels, tracks exposure over time, and can send emergency text alerts to a designated contact.


Monitor real-time air quality including CO2, CO, temperature, and humidity remotely. Connects to specific hardware devices via Ethernet or Bluetooth to display measurements. Organize devices into groups for simultaneous monitoring.


Monitor and manage your smart home devices for comfort, safety, and water leak detection. Receive alerts whether you're home or away, and integrate with various smart home partners for comprehensive control.




This application displays real-time CO2 levels from compatible wireless sensors. It provides a remote view of indoor air quality, helping users monitor their environment.


Detect paranormal activity and spirits using your device's sensors and camera. Explore haunted locations, capture evidence, and create maps of potential ghost activity. Designed for ghost hunters and paranormal investigators.