# World Cal vs ONE WATCH

The clearest difference is ads: ONE WATCH at none against World Cal's shown. ONE WATCH also leads on update cadence (every 3 days vs every 4 months). World Cal's advantage is iOS requirement (16.6 vs 18.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. World Cal sells 1 one-off in-app purchase and ONE WATCH sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

World Cal ships an update every 4 months, ONE WATCH every 3 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | World Cal | ONE WATCH |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (315 ratings)](https://appshunter.io/ios/app/world-cal/id792552743/reviews)** | — |
| Number of ratings | **315** | — |
| Positive reviews | 76.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 21 MB | 52 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Geospike Pty Ltd](https://appshunter.io/developer/500622151) | [Johann Szebeni](https://appshunter.io/developer/1880746405) |

## What reviewers say

### World Cal

[App page](https://appshunter.io/ios/app/world-cal/id792552743)

Easily schedule meetings and events across different time zones. This app helps you find the perfect time for global coordination by comparing multiple time zones and integrating with your existing calendar. Plan ahead with future time views and share events that automatically adjust to recipients' local times.

**Highlights:** Cross-timezone scheduling, View calendar in multiple timezones, Time travel to plan ahead, Add unlimited timezones, Day/night indicators, Home screen widget, Global event sharing

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Advertising | $19.95 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🌍 Great for multiple time zones
- 💡 Simple and efficient
- ✅ Clear display
- 🤝 Helpful for international scheduling

**What reviewers complain about**

- 💰 Expensive ad-free version
- 🔞 Inappropriate ads in free version
- 💸 High price for functionality

**Reported bugs**

- 🐛 Inappropriate ads in free version
- 🐛 Widget settings not saved
- 🐛 Cannot add new events with double tap
- 🐛 Timezone abbreviations not displayed
- 🐛 Search feature doesn't work

**Requested features**

- Add more cities
- Option to freeze time zones for comparison
- Switch between 24-hour and AM/PM clock
- Cleaner design with better calendar event integration
- Ability to pick a specific date to view


### ONE WATCH

[App page](https://appshunter.io/ios/app/one-watch-timezone-clock/id6777670673)

**Features:** Family Sharing, Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $2.99 | per month |
| Premium Yearly | $24.99 | per year |
| Premium Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is World Cal free?

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

### Is ONE WATCH free?

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

### Do World Cal or ONE WATCH have ads?

World Cal shows ads; ONE WATCH does not.

### Which is updated more often, World Cal or ONE WATCH?

World Cal ships an update every 4 months, and ONE WATCH every 3 days. Most recently, World Cal was updated on November 6, 2026 and ONE WATCH 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.*