# Barometer & Altimeter vs Aviation Weather Decoder

The clearest difference is in-app purchases: Barometer & Altimeter at none against Aviation Weather Decoder's 1. Barometer & Altimeter also leads on update cadence (every 10 days vs every 4 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Aviation Weather Decoder sells 1 in-app purchase, starting at $0.99 per month. Barometer & Altimeter asks for nothing beyond the download.

Barometer & Altimeter ships an update every 10 days, Aviation Weather Decoder every 4 weeks. The most recent releases landed on September 9, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Barometer & Altimeter | Aviation Weather Decoder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (25 ratings)](https://appshunter.io/ios/app/barometer-and-altimeter-howhigh/id921339656/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 4 weeks |
| Monetization | Free | — |
| Size | 7 MB | 8 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thirty Seven Inc.](https://appshunter.io/developer/554594255) | [阳 何](https://appshunter.io/developer/6777476774) |

## What reviewers say

### Barometer & Altimeter

[App page](https://appshunter.io/ios/app/barometer-and-altimeter-howhigh/id921339656)

This app provides precise barometer and altimeter readings with live data, session recording, and historical analysis. It features automatic device calibration and supports various Apple devices and accessibility features.

**Highlights:** Dual barometer and altimeter dashboards, Real-time pressure and elevation readings, Session recording with rich datasets, Interactive Swift Charts for analysis, Automatic device calibration, Optional WeatherKit sea-level calibration

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

**In-app purchases:** none


### Aviation Weather Decoder

[App page](https://appshunter.io/ios/app/aviation-weather-decoder/id6787396332)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Metar Decoder Premium | $0.99 | per month |


## Frequently asked questions

### Is Barometer & Altimeter free?

Barometer & Altimeter is free to download, with no in-app purchases.

### Is Aviation Weather Decoder free?

Aviation Weather Decoder is free to download, with in-app purchases available.

### Do Barometer & Altimeter or Aviation Weather Decoder have ads?

Neither Barometer & Altimeter nor Aviation Weather Decoder shows ads.

### Which is updated more often, Barometer & Altimeter or Aviation Weather Decoder?

Barometer & Altimeter ships an update every 10 days, and Aviation Weather Decoder every 4 weeks. Most recently, Barometer & Altimeter was updated on September 9, 2026 and Aviation Weather Decoder on September 18, 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.*