Miasma - Local Air Quality 4+

Your pollution & weather data

Darragh Rogan

    • 4.9 • 11 Ratings
    • Free


- shows publicly available air quality data for your locality (chosen automatically based on IP address, or manually by you)
- gives 1 hour weather forecast (including air quality data & pollen prediction, where available globally)
- lists potential pollution source data, such as electrical generation, aircraft overhead & road traffic (availability of data varies globally)
- shows and help make sense of climate change data (CO₂ emissions & global warming)
- menu bar icon changes colour to match current AQI PM₂.₅ conditions (and can show AQI numerically too)
- each data source is clickable to launch further information to see trends & forecasts
- notifies if the AQI quality worsens beyond a threshold you set, or separately if it improves below a threshold you set (ideal to help decide if you want to go for a run or not!)
- shows historical Air Quality (and compares to World Health Organisation guidelines) for SmartCitizen & PurpleAir users
- updates its metrics every 20 minutes
- simple graphics help make sense of the numbers given
- free open source software

Data is sourced from PurpleAir (only publicly available sensors), RapidAPI, global-warming.org/US NOAA, WAQI/AQICN.org, SmartCitizen, Sensor.Community, electricityMap, OpenSky, Telraam & Tomorrow.io.

I am actively developing this app, and am happy to receive comments, feedback & suggestions!

What’s New

Version 1.26

- Added support for Sensor.Community Particulate Matter sensors
- Corrected miscalculations in Climate Change stats

Ratings and Reviews

4.9 out of 5
11 Ratings

11 Ratings

SadExplorer ,

Great app, responsive developer!

With air quality in the bay area currently touch and go it's great to be able to get a quick sense of whether it's safe to go outside or open the windows, and Miasma provides just that ability. I am able to pin the menubar widget to my PurpleAir sensor and know in a glance what's going on or a quick check of the popdown menu and I immediately get other weather vitals from the same sensor. This is basically exactly what I wanted and I'm 100% satisfied.

I'll add that I started to have a crash-at-startup bug with a recent update and reached out to the developer. Within minutes I had a response and after a quick exchange they'd isolated the problem and provided a new build that addressed the issue (even though it's well into the evening in their time zone)! Outstanding service and responsiveness in addition to a useful app. Thank you.

HiddenJester ,

Great App, one suggestion

I'm installing this on my Mac to have an ambient monitor of my PurpleAir sensor, and it seems great for that. PurpleAir has several different correction formulas that can be used, and I'd like the option to use the EPA's Woodsmoke correction. This is fairly often different from the basic AQI value and more relevant during California Wildfire season. Thanks!

Developer Response ,

Many thanks for your review & suggestion (and hope you're keeping safe with wildfires).
I'm reading up on the conversion formulae - I'll give incorporating it a go ( from https://cfpub.epa.gov/si/si_public_file_download.cfm?p_download_id=540979&Lab=CEMM)

Ohyaaaaaaaaaaa ,

Works as expected

Love the Purple integration. Works just as I expected. The only thing I wish was different was being able to remove the "M" in the menubar. It doesn't make sense and would look a lot cleaner without it.

App Privacy

The developer, Darragh Rogan, 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 Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Identifiers
  • Usage Data

Data Linked to You

The following data may be collected and linked to your identity:

  • Usage Data

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Location
  • Identifiers
  • Usage Data
  • Diagnostics

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

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