Screenshot showing a map of San Francisco with PurpleAir sensors showing air quality on the map.

Like a breath of fresh air

Fast and lightweight, Paku loads every PurpleAir sensor on the map instantly.

Gorgeous Charts and Widgets

See how air quality, temperature, and humidity are trending with up to one week of historical data.

Screenshot of chart widgets on the iOS home screen for AQI, temperature, and raw PM10.0.

Screenshot of an iPhone lock screen with a notification regarding bad air quality from Paku.

Stay In-the-Know

Set up alerts and get real-time notifications when air quality goes south.

Everything Else

Favorites. Private sensors. watchOS and macOS support. Paku can do it all. Missing a feature you’d like? Reach out ↗

Screenshot of a favorites list that displays data from favorited sensors.

In the Press

MacStories: Hyper-Local Air Quality Tracking on Every Apple Platform ↗

The Washington Post: Best apps to check air quality near you ↗

SixColors: Getting a handle on outdoor air quality ↗

Macworld: The best apps with Lock Screen widgets ↗

MacRumors: Apps that have added iOS 16 Lock Screen widget support ↗

Berkeley Air: Paku has revolutionized PurpleAir ↗

Made with ♥ in Portland