# Know Time Zones vs World Clock

The clearest difference is in-app purchases: Know Time Zones at none against World Clock's 3. Know Time Zones also leads on iOS requirement (15.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. World Clock sells 3 in-app purchases, starting at $4.99 per month. Know Time Zones asks for nothing beyond the download.

## The numbers

| Metric | Know Time Zones | World Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (7 ratings)](https://appshunter.io/ios/app/world-clocktimezone-converter/id6759943378/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Monetization | — | Freemium |
| Size | 3 MB | 32 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Robert Li](https://appshunter.io/developer/903884223) | [Apphaze](https://appshunter.io/developer/1856021247) |

## What reviewers say

### Know Time Zones

[App page](https://appshunter.io/ios/app/know-time-zones/id1626299302)

**Features:** macOS Compatibility

**In-app purchases:** none


### World Clock

[App page](https://appshunter.io/ios/app/world-clocktimezone-converter/id6759943378)

Easily track time across multiple cities with visual gradients and an intuitive converter. Organize contacts by time zone, calculate dates, and utilize customizable widgets. Works offline for core functionality.

**Highlights:** Instant time conversion with visual slider, Hourly timeline grid with overlapping work times, Organize contacts into groups by time zone, Date and duration calculator, Customizable widgets for home screen, Offline functionality for core features

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| World Clock Pro Monthly | $4.99 | per month |
| World Clock Pro Yearly | $19.99 | per year |
| World Clock Pro Lifetime Access | $29.99 | one-time |


## Frequently asked questions

### Is Know Time Zones free?

Know Time Zones is free to download, with no in-app purchases.

### Is World Clock free?

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

### Do Know Time Zones or World Clock have ads?

Neither Know Time Zones nor World Clock shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*