# Local Haze — Air quality sensor confidence > Crowdsourced outdoor air quality data with sensor confidence ratings. (iPhone/iPad app by HumanLogic.) - Source: https://appshunter.io/ios/app/local-haze/id1278998405 (this page in markdown: same URL + `.md`) - Developer: [HumanLogic](https://appshunter.io/developer/731784112) - Category: Weather, Health & Fitness - Price: Free with in-app purchases - Rating: 4.60/5 from 32 App Store ratings · 19 written reviews indexed - Age rating: 4+ - Requires: iOS 17.6 · 60 MB - Languages: American English - Released: 2018-01-25 - Data updated: 2026-09-01 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/local-haze/id1278998405/reviews.md ## What is Local Haze? Local Haze crowdsources outdoor air quality data from many different sources and delivers it to your iPhone and Apple Watch. In release 2.3, as a Local Haze subscriber, you can now get air quality readings “at a glance” on your Apple Watch, widgets on your phone, and notifications for a sensor where significant changes in air quality have been detected. About Local Haze Local Haze reports air quality data from a variety of sensors across six continents, including AirGradient, AirNow, PurpleAir, Sensor.Community and uRADMonitor. In addition to viewing current air quality conditions, using Local Haze allows you to share sensor maps displaying air quality readings anywhere in the world. The World Health Organization and the U.S. Environmental Protection Agency (EPA) have developed guidelines for safe air quality as impacted by chemical pollutants and particulate matter (PM). PM smaller than 10 micrometers poses problems because it can enter the bloodstream. Local Haze displays the level of smaller PM 2.5 particles, which pose the most significant health risk. Local Haze Apple Watch app If you have disabled Automatic App Install on your Apple Watch, you can follow these directions to manually install it: https://support.apple.com/en-ca/guide/watch/apd99e3c6a68/watchos Local Haze Widgets A Local Haze widget allows subscribers, at a glance, to see a snapshot of their favorite AQ sensor. A tap on the widget displays the Local Haze sensor details screen. For directions on how to add a widget, visit this page: https://localhaze.humanlogic.com/2023/07/22/adding-a-local-haze-widget/ Notifications in Local Haze To set a notification, subscribers can tap the bell icon on the sensor details screen. Notifications will be sent to your phone when the air quality changes. How Local Haze Displays Air Quality Data Local Haze displays the EPA’s Air Quality Index (AQI) and a confidence rating for each sensor reading. The confidence rating is a feature that is unique to Local Haze and depends on many factors, including sensor maintenance and data freshness. Each AQ sensor reading is displayed as a face icon according to the key below, with a badge on the lower right that represents a confidence rating: Green Face: Air quality is Good. Air quality is considered satisfactory, and air pollution poses little or no risk. Yellow Face: Air quality is Moderate. Air quality is acceptable. For some pollutants, there may 
be a moderate health concern. Orange Face: Air quality is Unhealthy for sensitive groups. The general public is not likely to be affected, but people with heart and lung disease, older adults, and children are at greater risk. Red Face: Air quality is Unhealthy Everyone may begin to experience some adverse health effects, and members of the sensitive groups may experience more serious effects. Black face mask with respirator: Air quality is Hazardous. Everyone may experience more serious health effects with possible emergency conditions. The entire population is likely to be affected. Note: The source for the above AQ index classification is from Air Quality Index (AQI) Basics - EPA: https://www.airnow.gov/aqi/aqi-basics/ The confidence rating badges are: Green badge with thumbs up: High confidence in the air sensor reading. Yellow badge with OK sign: OK confidence in the air sensor reading. Red badge with thumbs down: Low confidence in the air sensor reading. We hope you enjoy using Local Haze! If you have any feedback about Local Haze please email us at localhaze@humanlogic.com or visit https://localhaze.humanlogic.com/ ## Key features - Crowdsourced air quality data - Global sensor network - Sensor confidence ratings - Apple Watch integration - Phone widgets - Air quality notifications - EPA AQI display ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | All Access - Monthly | $0.99 | per month | | All Access - Annual | $9.99 | per year | ## Recent user reviews (10 of 19) All indexed reviews: https://appshunter.io/ios/app/local-haze/id1278998405/reviews.md ### 4/5 — Great, but no AQI view on map *2026-07-26* Excellent -This is the only app that incorporates sensors from Purpleair, Airgradient etc. Very useful. Only drawback is the map that only shows color but no AQI in the location bubble. 5 stars if you can make that happen! ### 5/5 — NH *2026-07-01* User Friendly APP ### 5/5 — Great app! *2025-11-07* Easy to use, clean interface, and accurate data. Auto fills locations around you so you don’t have to manually input them yourself. Neat tool! ### 5/5 — Straight Forward *2025-10-01* This app has a format that is clear and easy to understand. It gives me peace of mind to understand the air quality in my area. ### 3/5 — Great but flawed *2024-04-23* The good: intuitive access to sensor network, more accuracy than other apps I’ve used, sensor reliability indicators. The bad: favorites cannot be grouped by location. The ugly: $10/year subscription to turn on air quality push notifications. Notifications are a basic safety feature in an air quality app, and linking them to a subscription service feels like hostage-taking. I’d gladly pay $30 for a one-time purchase of this app, but signing on to an open ended recurring payment where I’m opted into future price hikes is a hard no. The guy who invented SaaS should be vilified as one of history’s greatest scoundrels. ### 5/5 — Great app, super clean UI! *2022-04-01* A great app that fills a valuable niche in a way that few others do quite so well. Very user-friendly, with an excellent UI! ### 3/5 — OK, but Just approximate *2021-09-04* I was delighted to find an app to read local purple air sensors on my phone. However, the same sensor provides different AQI on my phone and purple air website. ### 5/5 — Great and imperfect *2021-08-20* I am happy to give Local Haze a five star review. It has more monitors that update more frequently than any other phone based air quality app. When there is a local fire and shifting winds, it tells me when to bring the kids in NOW not waiting an hour and a half like some other (generally good) apps. The graphics are simple and the features are few, but what it does, it does very well. And here in Northern California, that is critical. ### 5/5 — Great app! *2021-07-29* I downloaded Local Haze last week while in Lake Tahoe where the fires are happening. The app really helped me to understand the quality of the air while I was there. ### 5/5 — Decent Purple Air Monitor for AQI and PM Readings *2021-03-06* I have found that while Purple Air does not have an official app, Local Haze offers a simple app to view PM 1, 2.5, and 10 data as well as AQI readings. I only wish temp and humidity were also available on the app from the Purple Air monitor. ## Frequently asked questions about Local Haze ### What is Local Haze's subscription model? Local Haze offers a free tier with in-app purchases for enhanced features. Subscription plans include 'All Access - Monthly' for $0.99 and 'All Access - Annual' for $9.99, both with a 3-day free trial. ### How does Local Haze display air quality? Local Haze displays the EPA's Air Quality Index (AQI) using face icons to represent different levels from Good to Hazardous. It also provides a unique confidence rating for each sensor reading. ### Can I see air quality data on my Apple Watch with Local Haze? Yes, Local Haze offers Apple Watch integration, allowing subscribers to view air quality readings 'at a glance'. If automatic installation is off, you can manually install it via Apple's support pages. ### What sources does Local Haze use for air quality data? Local Haze aggregates data from various global sensors, including AirGradient, AirNow, PurpleAir, Sensor.Community, and uRADMonitor, covering six continents. ### How often is Local Haze updated? The latest version of Local Haze is 2.3.1, and it was last updated on July 14, 2025. This indicates a relatively recent update frequency. ### What age rating does Local Haze have? Local Haze has an age rating of 4+, making it suitable for a wide range of users, including children, to monitor air quality. ### Can I get alerts for air quality changes with Local Haze? Yes, subscribers can set up notifications within Local Haze. You will receive alerts on your phone when significant changes in air quality are detected for a chosen sensor. ### What are the benefits of the Local Haze widgets? Local Haze widgets allow subscribers to quickly see a snapshot of their favorite AQ sensor directly on their phone's home screen. Tapping the widget opens the detailed sensor information. ## Version history (last 5 releases) ### 2.3.1 — 2025-07-14 - Where known, acknowledge those who contribute their sensor data to the cloud (AirGradient & AirNow) ### 2.3.0 — 2025-06-27 - Add a native Apple Watch app - Add support for air quality sensors from AirGradient ### 2.2.5 — 2025-03-06 - Update for data source changes (uRADMonitor, US Department of State) ### 2.2.4 — 2024-04-15 - Add deep link to buy sensors from sensor details ### 2.2.3 — 2023-11-13 - iPhoneOS / iPadOS 17 / macOS 14 compatibility updates ## Apps similar to Local Haze | App | Rating | Price | Category | | --- | --- | --- | --- | | [Air Quality App - BreezoMeter](https://appshunter.io/ios/app/air-quality-app-breezometer/id989623380) | 4.8 (9,394) | Free | Weather | | [Pollen Wise](https://appshunter.io/ios/app/pollen-wise/id1474856970) | 4.5 (1,074) | Free | Weather | | [Forecast Now](https://appshunter.io/ios/app/forecast-now/id452087262) | 4.4 (1,543) | Free | Weather | | [Air Matters](https://appshunter.io/ios/app/air-matters/id477700080) | 4.6 (2,527) | Free | Weather | | [Air Quality & Pollen - AirCare](https://appshunter.io/ios/app/air-quality-and-pollen-aircare/id1190987663) | 4.8 (3,237) | Free | Weather | | [UV Index Widget - Worldwide](https://appshunter.io/ios/app/uv-index-widget-worldwide/id1100568288) | 4.8 (14,418) | Free | Weather | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-01.*