# Contrails Observer — Join contrail climate research

> Citizen science app for observing and reporting aircraft contrails for climate research. (iPhone/iPad app by Breakthrough Energy, LLC.)

- Source: https://appshunter.io/ios/app/contrails-observer/id6454432163 (this page in markdown: same URL + `.md`)
- Developer: [Breakthrough Energy, LLC](https://appshunter.io/developer/1699525777)
- Category: Education, Weather
- Price: Free
- Rating: 1.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 46 MB
- Languages: English
- Released: 2023-11-09
- Data updated: 2026-07-24
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/contrails-observer/id6454432163/reviews.md

## What is Contrails Observer?

Aircraft contrails often grow into cirrus clouds that trap heat in the lower atmosphere and significantly add to global warming. Recent estimates show that contrail-cirrus warming is roughly equivalent to the warming caused by the greenhouse gas emissions of those same aircraft, or roughly 1 - 2% of all anthropogenic climate change.

The Contrails Observer app enables researchers and citizen scientists to observe contrail forming regions of the atmosphere from the ground. These observations will support the detection of contrail forming regions and improve weather forecasts to reduce contrail-climate impact of aviation.

Read more at https://www.contrails.org

## Key features

- Observe contrail formation regions
- Contribute to climate research
- Improve weather forecasts
- Citizen science participation
- Ground-based observations

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/contrails-observer/id6454432163/reviews.md

### 1/5 — Gates’ death touch continued

*2025-05-06*

Bill Gates is involved. No thanks.

## Frequently asked questions about Contrails Observer

### What is Contrails Observer used for?

Contrails Observer is used by researchers and citizen scientists to observe contrail forming regions from the ground. These observations help improve weather forecasts and reduce the climate impact of aviation.

### Is Contrails Observer free to use?

Yes, Contrails Observer is available for free. It does not have any in-app purchases or advertisements.

### What devices does Contrails Observer support?

Contrails Observer is currently supported on iPhone devices.

### How often is Contrails Observer updated?

The app was last updated on July 8, 2025, with version 1.5.0. This indicates a relatively recent update, suggesting ongoing development and support.

### What is the age rating for Contrails Observer?

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

### What is the user sentiment for Contrails Observer?

Based on the available data, Contrails Observer has a rating of 1.0 stars from 1 rating. This single rating suggests limited user feedback at this time.

### How does Contrails Observer contribute to climate research?

By enabling ground-based observation of contrails, the app helps identify regions where contrails form. This data is crucial for understanding their impact on global warming and improving climate models.

## Version history (last 5 releases)

### 1.5.0 — 2025-07-08

Updates and bug fixes.

### 1.4.3 — 2025-04-05

Updates & bug fixes.

### 1.4.2 — 2024-10-09

Stability fixes and iOS 18 support.

### 1.4.1 — 2024-08-15

Bug fixes, enhancements with sensor data.

### 1.4.0 — 2024-07-23

Bug fixes & updates to improve data accuracy.

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## Related topics

[contrails observer](https://appshunter.io/ios/topics/contrails-observer) · [contrails aviation](https://appshunter.io/ios/topics/contrails-aviation)

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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 2026-07-24.*