# Earthquake Alert Map vs Aviation Weather Decoder

The clearest difference is in-app purchases: Earthquake Alert Map at none against Aviation Weather Decoder's 1. Aviation Weather Decoder's advantage is update cadence (every 4 weeks vs every 4 months). 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. Earthquake Alert Map asks for nothing beyond the download.

Earthquake Alert Map ships an update every 4 months, Aviation Weather Decoder every 4 weeks. The most recent releases landed on July 7, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Earthquake Alert Map | Aviation Weather Decoder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/earthquake-alert-map/id1557684602/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 4 MB | 8 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Omer Rahmanovic](https://appshunter.io/developer/1508177919) | [阳 何](https://appshunter.io/developer/6777476774) |

## What reviewers say

### Earthquake Alert Map

[App page](https://appshunter.io/ios/app/earthquake-alert-map/id1557684602)

This app provides real-time earthquake monitoring and tsunami detection. It features an interactive map, detailed lists, and proximity alerts to keep you informed about seismic activities and potential threats worldwide.

**Highlights:** Real-time earthquake data, Interactive live map visualization, Detailed earthquake and tsunami lists, Proximity alerts based on location, Customizable notifications, Global coverage, Tsunami detection

**Features:** macOS Compatibility

**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 Earthquake Alert Map free?

Earthquake Alert Map 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 Earthquake Alert Map or Aviation Weather Decoder have ads?

Neither Earthquake Alert Map nor Aviation Weather Decoder shows ads.

### Which is updated more often, Earthquake Alert Map or Aviation Weather Decoder?

Earthquake Alert Map ships an update every 4 months, and Aviation Weather Decoder every 4 weeks. Most recently, Earthquake Alert Map was updated on July 7, 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.*