My PurpleAir 4+

Your PurpleAir’s air quality

Paul Demers

Designed for iPad

    • 5.0 • 2 Ratings
    • Free


Monitor the AQI from your own PurpleAir sensor from your iPhone, iPad, or watch. Use the app's simple screen, or, add a widget / complication to your Home Screen / watch face..

This app can only monitor a sensor on the same LAN as the watch or companion phone.

To setup:
1. Enter your sensor’s IP address.
2. Add a app’s complication or widget to your home page to watch faces.

Data sharing between an iPhone/iPad and a companion watch:
1. In this version, only the sensor address is shared. 
2. If one device has an address, but the other doesn't, then opening the app that doesn't have an address copies the address from the paired device.
a. If the address doesn't copy within a minute, close the app on both devices and restart them.
3. Changing address on the phone changes the address on the watch.
a. Changing the address on the watch does not change the phone, UNLESS the phone doesn't have an address.
b. So, if you want the addresses to be different, enter and address on the phone first, then enter one on the watch.

Air quality details: The app shows the PM2.5, "120 second average refreshed every 10 seconds" on the sensor's built in web page. It averages the A and B channels. Specifically, the pm2.5_aqi and pm2.5_aqi_b fields from the json API. You can see same numbers by pointing a browser at http://device_address/json

The app updates the AQI approximately every 15-20 minutes, or when you open the app or restart your watch. It can take a long time to update widgets/complications when reconnecting to a network. On iPhone/iPads with iOS version 16.4 or higher installed, the app is refreshable, that is, pulling down on the screen forces everything to refresh.

NOTICE: This app is not a product of PurpleAir, Inc.

What’s New

Version 2.4

Show sample details (iOS 16 and higher).
Tabbed UI.
Faster device search.
Send samples from phone to watch.

Ratings and Reviews

5.0 out of 5
2 Ratings

2 Ratings

mattv123 ,

Works great and free!

Thank you for making this app! It works exactly as described on both my phone and watch, and I finally have a local aqi complication on my watch. Much appreciated.

Sarlizbeth ,

Neat complication

Our sensor can’t be seen from the house so a watch complication is a great solution, thanks!

KDH peleador ,

App does not download

App does not install

Developer Response ,

It is difficult to install, yes. Once purchased for $0.00, be sure your watch is on wifi, then open the app store app on your watch, search for the app by name, click on it, then there is a button to download and install directly on your watch.

App Privacy

The developer, Paul Demers, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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