# Cyanometer vs Spectrum

The clearest difference is price: Spectrum at Free against Cyanometer's $0.99. Spectrum also leads on update cadence (every 2 days vs every 39 months) and review sentiment (33% vs 25%). Cyanometer's advantage is in-app purchases (none vs 2) and chart position (#187 vs unranked). On ads and device support there is nothing between them.

Spectrum is free to download; Cyanometer costs $0.99 up front. Spectrum sells 2 in-app purchases, starting at $2.99 per month. Cyanometer asks for nothing beyond the download.

Cyanometer ships an update every 39 months, Spectrum every 2 days. The most recent releases landed on October 9, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Cyanometer | Spectrum |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[2.8 (4 ratings)](https://appshunter.io/ios/app/cyanometer/id1476812898/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 25.0% of reviews | **33.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 2 days** |
| Monetization | Paid | **Freemium** |
| Best chart rank | **#187** | — |
| Size | 14 MB | 15 MB |
| Requires iOS | **16** | 26.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Jan-Hendrik von Kuick](https://appshunter.io/developer/1190145903) | [Simon Storz](https://appshunter.io/developer/924848267) |

## What reviewers say

### Cyanometer

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

**Currently charting:** #187 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


### Spectrum

[App page](https://appshunter.io/ios/app/spectrum-visual-weather/id6758513953)

A minimalist weather app and widget for iOS that visually represents forecasts using color and clarity. It offers an AI-assisted summary to highlight essential information and allows for personalization of displayed data and units. Enjoy core features for free, with an option to upgrade for more.

**Highlights:** Visual weather forecasts, Home screen widgets, Apple Watch app & complications, AI-assisted summaries, Personalizable data and units, Privacy-focused data handling

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Spectrum Premium Monthly | $2.99 | per month |
| Spectrum Premium Yearly | $17.99 | per year |


## Frequently asked questions

### Is Cyanometer free?

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

### Is Spectrum free?

Spectrum is free to download, with in-app purchases available.

### Do Cyanometer or Spectrum have ads?

Neither Cyanometer nor Spectrum shows ads.

### Which is updated more often, Cyanometer or Spectrum?

Cyanometer ships an update every 39 months, and Spectrum every 2 days. Most recently, Cyanometer was updated on October 9, 2026 and Spectrum on October 12, 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.*