Monitor carbon dioxide levels remotely and receive real-time readings and push notifications when levels become unhealthy. Stay on top of air quality and take action to improve ventilation and keep your environment safe.





223+ iOS apps curated and reviewed
OTG CO Leak Detector is the household name in carbon monoxide detection, but it's far from the only option. We track 223+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.








Monitor carbon dioxide levels remotely and receive real-time readings and push notifications when levels become unhealthy. Stay on top of air quality and take action to improve ventilation and keep your environment safe.




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.


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.


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.




Explore gas and vapor measurement technology with this app. It details Dräger-Tube, Dräger Sensor, and Dräger Chip systems, offering comprehensive listings of tubes and chips with measurement parameters. Learn about portable monitors and access support resources like compatibility charts and how-to videos.




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.


Monitor your indoor air quality with a connected sensor. View real-time levels, track exposure hotspots throughout the day, and review your air quality history.


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.




Control your smart home devices, including thermostats, cameras, and sensors. Automate your home for comfort and peace of mind, and monitor entryways and cabinets with intelligent alerts. Save energy with custom schedules and find potential rebates.


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.


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.


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.


Monitor your indoor air quality with this companion app for a specific device. Analyze data, identify pollution sources, and take steps to improve your health and performance.


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.


Manage your smart home devices and stay updated on home activity. Easily control devices with voice commands and view live camera feeds. Organize your home into custom dashboards for quick access.