# World Clock vs GPTExpress

The clearest difference is device support: GPTExpress at 3 against World Clock's 1. GPTExpress also leads on iOS requirement (14.0 vs 17.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. World Clock sells 1 one-off in-app purchase and GPTExpress sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | World Clock | GPTExpress |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Size | 2 MB | 37 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mehmet Erdem Devge](https://appshunter.io/developer/1464750482) | [Rippleit LLC](https://appshunter.io/developer/1896119301) |

## What reviewers say

### World Clock

[App page](https://appshunter.io/ios/app/world-clock-time-zone-tracker/id6738009591)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Features- Lifetime | $1.99 | one-time |


### GPTExpress

[App page](https://appshunter.io/ios/app/gptexpress/id6778603599)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 Credits | $2.99 | one-time |
| 5 Credits | $4.99 | one-time |
| 10 Credits | $9.99 | one-time |
| 25 Credits | $24.99 | one-time |
| 50 Credits | $49.99 | one-time |


## Frequently asked questions

### Is World Clock free?

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

### Is GPTExpress free?

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

### Do World Clock or GPTExpress have ads?

Neither World Clock nor GPTExpress shows ads.

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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.*