Local Haze

Name: Local Haze
Rating: 4.6 (30 reviews)
Author: HumanLogic

Air quality sensor confidence

Free · In‑App Purchases · Designed for iPhone

30 Ratings
Ages

4+
Years
Category

Weather
Developer

HumanLogic
Language

EN
English
Size

62.3
MB

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/

Ratings & Reviews

4.6

out of 5

30 Ratings

Great and imperfect
08/20/2021

Loquat lover
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.
Great and imperfect
08/20/2021

Loquat lover

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.
Decent Purple Air Monitor for AQI and PM Readings
03/06/2021

XIXIILXXXI
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.
Decent Purple Air Monitor for AQI and PM Readings
03/06/2021

XIXIILXXXI

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.
Great but flawed
04/23/2024

Marriott Time-waster
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.
Great but flawed
04/23/2024

Marriott Time-waster

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.
Great app!
11/07/2025

nora-ar
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!
Great app!
11/07/2025

nora-ar

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!

- Where known, acknowledge those who contribute their sensor data to the cloud (AirGradient & AirNow)

Version 2.3.1

07/14/2025

Data Not Collected

The developer does not collect any data from this app.

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