# Barometer Plus vs Cyanometer

The clearest difference is rating: Barometer Plus at 4.0 against Cyanometer's 2.8. Barometer Plus also leads on review sentiment (59% vs 25%) and update cadence (every 11 days vs every 39 months). Cyanometer's advantage is price ($0.99 vs $3.99). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Barometer Plus costs $3.99 and Cyanometer $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Barometer Plus holds the better App Store score, 4.0 against 2.8. Both are backed by a comparable volume of ratings — 5 and 4 respectively. Written reviews point the same way: 59% of Barometer Plus's written reviews are positive against 25% of Cyanometer's.

Barometer Plus ships an update every 11 days, Cyanometer every 39 months. The most recent releases landed on September 21, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Barometer Plus | Cyanometer |
| --- | --- | --- |
| Price | $3.99 | **$0.99** |
| Rating | **[4.0 (5 ratings)](https://appshunter.io/ios/app/barometer-plus-altimeter-pro/id1174281818/reviews)** | [2.8 (4 ratings)](https://appshunter.io/ios/app/cyanometer/id1476812898/reviews) |
| Number of ratings | **5** | 4 |
| Positive reviews | **59.0% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 39 months |
| Monetization | Paid | Paid |
| Best chart rank | **#76** | #198 |
| Size | 38 MB | 14 MB |
| Requires iOS | **13.0** | 16 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ngo Na](https://appshunter.io/developer/1061345952) | [Jan-Hendrik von Kuick](https://appshunter.io/developer/1190145903) |

## What reviewers say

### Barometer Plus

[App page](https://appshunter.io/ios/app/barometer-plus-altimeter-pro/id1174281818)

**Currently charting:** #76 Top Paid · Weather (US App Store)

This app utilizes your device's barometer sensor to measure air pressure and altitude, helping you monitor and predict short-term weather changes. It also allows users to track how pressure impacts mood and optimize fishing conditions. The app offers extensive customization and historical data tracking.

**Highlights:** Barometer and altimeter with analog display, Temperature and humidity display, Pressure and altitude unit conversion, GPS and METAR calibration, Relative altitude measurement, Pressure change notifications, Pressure tracking and history graph

**Features:** Vision Pro support

**In-app purchases:** none


### Cyanometer

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

**Currently charting:** #198 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 Barometer Plus free?

Barometer Plus costs $3.99, with no in-app purchases.

### Is Cyanometer free?

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

### Which has better reviews, Barometer Plus or Cyanometer?

Barometer Plus is rated higher. Barometer Plus averages 4.0 out of 5 from 5 ratings, while Cyanometer averages 2.8 from 4 ratings.

### Do Barometer Plus or Cyanometer have ads?

Neither Barometer Plus nor Cyanometer shows ads.

### Which is updated more often, Barometer Plus or Cyanometer?

Barometer Plus ships an update every 11 days, and Cyanometer every 39 months. Most recently, Barometer Plus was updated on September 21, 2026 and Cyanometer on September 22, 2026.

### Which is more popular, Barometer Plus or Cyanometer?

Barometer Plus currently peaks at #76 in the App Store charts, and Cyanometer at #198. Chart position reflects recent download velocity rather than total install base.

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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.*