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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 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. Monitor changes with Live Activities.

Everything Else

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

4.7 · 11,000+ ratings

Screenshot of a map of the San Francisco Bay Area showing temperature readings, with a menu for switching between air quality, temperature, humidity, and PM2.5.

In the Press

The Washington Post: Best apps to check air quality near you ↗ and how to choose the best weather app ↗

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

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 ↗

Mashable: How to check the air quality near you ↗

PurpleAir Blog: The Paku App: View PurpleAir Air Quality Data ↗

Apple Developer: How Paku on Apple Watch helps people breathe easy ↗

Springboard: App Picks July 2026 ↗

Lickability: Single-Serving Apps ↗

Lex on Tech: Paku offers a high quality look at air quality ↗

Made with ♥ in Portland