# Aurora Forecast 3D vs Cyanometer

The clearest difference is price: Aurora Forecast 3D at Free against Cyanometer's $0.99. Aurora Forecast 3D also leads on rating (3.7 vs 2.8) and update cadence (every 2 months vs every 39 months). Cyanometer's advantage is chart position (#193 vs unranked). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Aurora Forecast 3D is free to download; Cyanometer costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Aurora Forecast 3D holds the better App Store score, 3.7 against 2.8. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews point the same way: 33% of Aurora Forecast 3D's written reviews are positive against 25% of Cyanometer's.

Aurora Forecast 3D ships an update every 2 months, Cyanometer every 39 months. The most recent releases landed on August 19, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Aurora Forecast 3D | Cyanometer |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/aurora-forecast-3d/id1266448783/reviews)** | [2.8 (4 ratings)](https://appshunter.io/ios/app/cyanometer/id1476812898/reviews) |
| Number of ratings | 3 | **4** |
| Positive reviews | **33.3% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 39 months |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#193** |
| Size | 48 MB | 14 MB |
| Requires iOS | **11.0** | 16 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [University Centre in Svalbard (UNIS)](https://appshunter.io/developer/1266448782) | [Jan-Hendrik von Kuick](https://appshunter.io/developer/1190145903) |

## What reviewers say

### Aurora Forecast 3D

[App page](https://appshunter.io/ios/app/aurora-forecast-3d/id1266448783)

Visualize Earth in 3D and track the aurora borealis with real-time data and forecasts up to three days ahead. Includes an aurora compass, star maps, and satellite tracking.

**Highlights:** 3D Earth visualization, Real-time aurora oval tracking, Up to 3-day aurora forecasts, Aurora compass with Sun and Moon, 2.4 million star map, Satellite orbit calculations

**Features:** Vision Pro support

**In-app purchases:** none


### Cyanometer

[App page](https://appshunter.io/ios/app/cyanometer/id1476812898)

**Currently charting:** #193 Top Paid · Weather (US App Store)

Measure the intensity of blue in the sky to understand atmospheric conditions. Save scans with location and time data for comparison across different places. Offers modern, historical, and custom color scales.

**Highlights:** Measure sky blueness intensity, Modern, Saussure, and custom scales, Save scans with date, time, and location, Compare sky conditions across locations, Privacy-focused, no external data processing

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

**In-app purchases:** none


## Frequently asked questions

### Is Aurora Forecast 3D free?

Aurora Forecast 3D is free to download, with no in-app purchases.

### Is Cyanometer free?

Cyanometer costs $0.99, with no in-app purchases.

### Which has better reviews, Aurora Forecast 3D or Cyanometer?

Aurora Forecast 3D is rated higher. Aurora Forecast 3D averages 3.7 out of 5 from 3 ratings, while Cyanometer averages 2.8 from 4 ratings.

### Do Aurora Forecast 3D or Cyanometer have ads?

Neither Aurora Forecast 3D nor Cyanometer shows ads.

### Which is updated more often, Aurora Forecast 3D or Cyanometer?

Aurora Forecast 3D ships an update every 2 months, and Cyanometer every 39 months. Most recently, Aurora Forecast 3D was updated on August 19, 2026 and Cyanometer on September 22, 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.*