# Airthings vs KnowColumbia

The clearest difference is update cadence: Airthings at fortnightly against KnowColumbia's every 4 months. KnowColumbia's advantage is iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Airthings ships an update fortnightly, KnowColumbia every 4 months. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Airthings | KnowColumbia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (3K ratings)](https://appshunter.io/ios/app/airthings/id1560329275/reviews)** | — |
| Number of ratings | **3K** | — |
| Positive reviews | 33.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 104 MB | 47 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Airthings ASA](https://appshunter.io/developer/1101077902) | [GOGov, Inc.](https://appshunter.io/developer/351223719) |

## What reviewers say

### Airthings

[App page](https://appshunter.io/ios/app/airthings/id1560329275)

Monitor and improve your indoor air quality with smart devices. Get real-time insights, track trends, and receive actionable advice to enhance focus, reduce allergies, and sleep better. Control your air purifier and stay informed about pollen forecasts.

**Highlights:** Quick device setup, At-a-glance air quality indicators, Detailed trend tracking, Air purifier remote control, 5-day pollen forecast, Air quality notifications, Personalized air reports

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Simple to understand and setup
- 🚀 Intuitive and easy to use app
- 🚀 Efficient and fast
- 🚀 Provides great information on air quality
- 🚀 Accurate and reliable sensor readings

**What reviewers complain about**

- 🐛 App has connectivity issues, often fails to sync
- 🐛 App is buggy and has many errors
- 🐛 Inaccurate or inconsistent sensor readings
- 🐛 Difficult to set up and connect devices
- 🐛 Lack of customization options for thresholds and notifications

**Reported bugs**

- App crashes frequently
- Unable to add new devices or accounts
- Incorrect color coding and data display
- Delayed or missing sensor data updates
- Bluetooth connectivity issues

**Requested features**

- Add HomeKit integration
- Allow custom thresholds and notifications
- Improve data visualization and historical trending
- Add more detailed information on air quality issues and remedies
- Provide an iPad-optimized version of the app


### KnowColumbia

[App page](https://appshunter.io/ios/app/knowcolumbia/id6478636450)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Airthings free?

Airthings is free to download, with no in-app purchases.

### Is KnowColumbia free?

KnowColumbia is free to download, with no in-app purchases.

### Do Airthings or KnowColumbia have ads?

Neither Airthings nor KnowColumbia shows ads.

### Which is updated more often, Airthings or KnowColumbia?

Airthings ships an update fortnightly, and KnowColumbia every 4 months. Most recently, Airthings was updated on October 24, 2026 and KnowColumbia on October 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*