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.






158+ iOS apps curated and reviewed
From beginner-friendly picks to power-user tools, our carbon monoxide list covers 158+ iPhone apps updated through July 2026. Compare ratings, prices, and screenshots in one place.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free | 2.7★ (3) | No | No | May 2026 | |
| 2 | Free | 2.8★ (15) | No | No | May 2026 | |
| 3 | Free | 4.6★ (2.5K) | Yes | Yes | Aug 2026 | |
| 4 | Free | 4.8★ (44K) | No | No | Aug 2026 | |
| 5 | Free | 4.0★ (7) | No | No | May 2026 | |
| 6 | Free | — | No | No | May 2026 | |
| 7 | Free | — | No | No | May 2026 | |
| 8 | Free | 3.4★ (12) | No | No | May 2026 |






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.



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.






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.


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.


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.


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 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 aviation-specific health and environmental data. Track oxygen levels, carbon monoxide, and turbulence for enhanced flight safety and comfort. Integrates with various hardware devices for real-time insights.


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.


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.


Explore live and historical electricity data globally. Track production mix, CO2 emissions, prices, and renewable energy sources in real-time.


Control your home's climate and air quality remotely. Optimize energy usage, schedule your systems, and monitor indoor conditions for improved health and comfort. Integrates with smart home devices.


This utility app transmits data through your device's audio jack. It is currently compatible with select high-end devices.


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.


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


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.




Manage and monitor your connected home devices, including smart smoke and carbon monoxide alarms. Receive emergency notifications and enjoy premium audio and voice commands with integrated smart assistants.


Extracts data from specific Firehawk Carbon Monoxide alarms. Supports models CO7B10Y, CO7BD, CO7B10W, and CO10-RF for data retrieval.