# Miasma - Local Air Quality — Your pollution & weather data

> Local air quality, weather, pollution, traffic, and climate data. (iPhone/iPad app by Darragh Rogan.)

- Source: https://appshunter.io/ios/app/miasma-local-air-quality/id1529785874 (this page in markdown: same URL + `.md`)
- Developer: [Darragh Rogan](https://appshunter.io/developer/1518488644)
- Category: Weather, Health & Fitness
- Price: Free
- Rating: 1.00/5 from 1 App Store ratings · 11 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 6 MB
- Languages: English
- Released: 2020-09-08
- Data updated: 2026-06-05
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/miasma-local-air-quality/id1529785874/reviews.md

## What is Miasma?

- shows publicly available air quality data for your locality (chosen automatically based on IP address and / or manually by you from PurpleAir, WAQI/AQICN or SmartCitizen)
- gives 1 hour weather forecast (including air quality data & pollen prediction, if available globally)
- lists potential pollution source data from Electrical consumption (availability of data varies globally)
- shows road traffic data from Telraam
- shows Climate Change data from US NOAA & NASA
- very fast loading app to give quick updates to users
- supports zoomed view in addition to standard
- supports dark mode & light mode
- free open source software

Data is sourced from PurpleAir, WAQI/AQICN.org, SmartCitizen, CO2Signal/electricityMap & Tomorrow.
Note that if you wish to use your own PurpleAir, SmartCitizen or WAQI/AQICN sensor, you need to transcribe the sensor ID manually from their websites to the app.

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

## Key features

- Local air quality data
- 1-hour weather forecast
- Pollen prediction
- Pollution source data
- Road traffic data
- Climate change data
- Dark and light modes

## Recent user reviews (10 of 11)

All indexed reviews: https://appshunter.io/ios/app/miasma-local-air-quality/id1529785874/reviews.md

### 1/5 — Stopped workin on Mojave

*2025-11-23*

Can't even access prefs

### 1/5 — Just shows questionmark in menubar

*2024-09-24*

All other data seems okay i guess

### 3/5 — Seems ok but only shows LA for me

*2024-03-27*

I want to like the app, and if you live in a big city it probably works well.  In a small city it would only show me LA which is not even close.  Changing the location did not work

### 4/5 — Capable app.  Needs some enhancements.

*2023-06-12*

First off, I do like the app so far.  However, there are a couple ideas for it.

One:  Allow the user to specify temperatures in the summary page to be displayed as Celcius or Fahrenheit.  Mine are being displayed as Celcius, I prefer Fahrenheit.

Two.  Put an option to load automatically at system startuo.  Having to use System Settings and manually insert the appp into the Startup Apps section is a hassle when one click could do it.

### 4/5 — Great app, need enhancement

*2022-10-25*

thansk for the greate app as air quality is not good in my area, I met an issue to update date on both WAQI and PurpleAir, when input right vaule, both of them have error,please take xi'an for testing and fix it, thanks

### 5/5 — Great App

*2022-04-21*

Love this app, the only thing i wish it had was to integrate local OA Temp on the menu bar icon or allow the choice between AQI and OAT.

### 5/5 — Works as expected

*2021-08-27*

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.

### 5/5 — Great App, one suggestion

*2021-08-19*

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)
Darragh

### 5/5 — California is burning and this app lets me know if I'll have school

*2020-10-02, version 1.10*

Burn burn burn

I do think it would look nicer if the M in the menubar could be hidden, and if the menubar used more contrasting emojis, because they are kind of dull.

### 5/5 — Great app, responsive developer!

*2020-10-01*

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.

## Frequently asked questions about Miasma

### What is Miasma's air quality data based on?

Miasma displays publicly available air quality data sourced from PurpleAir, WAQI/AQICN.org, and SmartCitizen. It can automatically detect your location or allow manual selection.

### Does Miasma offer weather forecasts?

Yes, Miasma provides a 1-hour weather forecast, which also includes air quality data and pollen predictions if available globally.

### Can I use my own sensor with Miasma?

If you wish to use your own PurpleAir, SmartCitizen, or WAQI/AQICN sensor, you need to manually transcribe the sensor ID from their respective websites into the app.

### What other environmental data does Miasma show?

Miasma also lists potential pollution source data from electrical consumption, road traffic data from Telraam, and climate change data from US NOAA & NASA.

### Is Miasma free to use?

Miasma is free open source software. However, it does contain advertisements.

### What devices does Miasma support?

Miasma is available for Mac, iPhone, iPad, and iPod.

### How often is Miasma updated?

The latest version is 1.15, last updated on June 12, 2022. The developer is actively working on the app and welcomes feedback.

### What is the age rating for Miasma?

Miasma has an age rating of 4+, making it suitable for a wide range of users.

## Version history (last 5 releases)

### 1.15 — 2022-06-12

- showed climate change stats

### 1.14 — 2022-06-07

- Usability improvements following some user observations (thanks Mam & Dad!)
- Relaid content screen to better accommodate users who use the Zoomed display setting
- Show a welcome message to guide users
- Refined Preferences screens to guide users better
- Gave info on WHO & AQI scales used
- Indicate precipitation probability in 1 hour forecast

### 1.13 — 2022-06-03

- added ability to show closest air quality sensor to you in addition to your manually chosen one (so, when you're out and about you can see local plus keep an eye on home air quality sensor too)
- refined 1 hour forecast visual presentation & additionally showed UV
- tidied up some data types, decimal places etc.

### 1.12 — 2022-05-30

- indicate historical data for PurpleAir users
- implemented "pull to refresh" to give a familiar way to refresh the readings

### 1.11 — 2022-05-25

- added Telraam road traffic data support
- added SmartCitizen Historical data
- tightened up vertical layout
- clarified guidance text

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-05.*