# World Clock... vs iCool School

The clearest difference is ads: iCool School at none against World Clock...'s shown. iCool School also leads on iOS requirement (13.0 vs 16.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. World Clock... sells 2 in-app purchases, starting at $1.99 per month and iCool School sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | World Clock... | iCool School |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | Monthly |
| Size | 121 MB | 105 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Olga Ivanova](https://appshunter.io/developer/1733570435) | [Moafak Mosaly](https://appshunter.io/developer/1753462799) |

## What reviewers say

### World Clock...

[App page](https://appshunter.io/ios/app/world-clock/id6751114970)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| timezones_by_oliva_subscription | $1.99 | per month |
| timezones_by_oliva_donation | $1.99 | one-time |


### iCool School

[App page](https://appshunter.io/ios/app/icool-school/id6760373153)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Autism: The Emerging Threat - | $49.00 | one-time |
| AI in Digital Education - | $49.00 | one-time |
| Grade 6 Computer Science - | $49.00 | one-time |
| "English for Beginners A1: | $50.00 | one-time |
| German for Beginners: From | $99.00 | one-time |
| Arabic Teaching for | $100.00 | one-time |
| (Fast Track) IELTS Exam | $200.00 | one-time |


## Frequently asked questions

### Is World Clock... free?

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

### Is iCool School free?

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

### Do World Clock... or iCool School have ads?

World Clock... shows ads; iCool School does not.

### Which is updated more often, World Clock... or iCool School?

World Clock... ships an update monthly, and iCool School monthly. Most recently, World Clock... was updated on October 25, 2026 and iCool School on October 31, 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.*