# Global Time Machine vs Aviation Weather Decoder

The clearest difference is update cadence: Global Time Machine at every 5 days against Aviation Weather Decoder's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Global Time Machine sells 2 in-app purchases, starting at $0.99 per month and Aviation Weather Decoder sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Global Time Machine ships an update every 5 days, Aviation Weather Decoder every 2 months. The most recent releases landed on November 6, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Global Time Machine | Aviation Weather Decoder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (7 ratings)](https://appshunter.io/ios/app/global-time-machine/id1082674619/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 58.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 2 months |
| Monetization | Free | — |
| Size | 12 MB | 8 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, Mac, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [theMakeApp](https://appshunter.io/developer/1014975385) | [阳 何](https://appshunter.io/developer/6777476774) |

## What reviewers say

### Global Time Machine

[App page](https://appshunter.io/ios/app/global-time-machine/id1082674619)

Easily track the time in any city worldwide. Add locations to your list to plan international calls, meetings, or connect with loved ones abroad. Features DST support and quick access to nearby hours.

**Highlights:** Track time in over 20,000 cities, View nearby hours by scrolling, Convenient world clock interface, DST support for all locations, Shake to reset functionality

**Features:** Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium · Monthly | $0.99 | per month |
| Premium · Yearly | $9.99 | per year |


### 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 Global Time Machine free?

Global Time Machine is free to download, with in-app purchases available.

### Is Aviation Weather Decoder free?

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

### Do Global Time Machine or Aviation Weather Decoder have ads?

Neither Global Time Machine nor Aviation Weather Decoder shows ads.

### Which is updated more often, Global Time Machine or Aviation Weather Decoder?

Global Time Machine ships an update every 5 days, and Aviation Weather Decoder every 2 months. Most recently, Global Time Machine was updated on November 6, 2026 and Aviation Weather Decoder on October 24, 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.*