# ONE WATCH vs ZoneTime

The clearest difference is device support: ONE WATCH at 3 against ZoneTime's 1. ZoneTime's advantage is iOS requirement (16.4 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on October 9, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | ONE WATCH | ZoneTime |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 days | Every 3 days |
| Size | 52 MB | 51 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Johann Szebeni](https://appshunter.io/developer/1880746405) | [Meng-Yi Hsu](https://appshunter.io/developer/6783592735) |

## What reviewers say

### 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 |


### ZoneTime

[App page](https://appshunter.io/ios/app/zonetime-world-clock/id6797138733)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All-Apps Unlock | $5.99 | one-time |
| Unlock ZoneTime | $7.99 | one-time |
| Unlock ZoneTime Final | $9.99 | one-time |


## Frequently asked questions

### Is ONE WATCH free?

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

### Is ZoneTime free?

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

### Do ONE WATCH or ZoneTime have ads?

Neither ONE WATCH nor ZoneTime shows ads.

### Which is updated more often, ONE WATCH or ZoneTime?

ONE WATCH ships an update every 3 days, and ZoneTime every 3 days. Most recently, ONE WATCH was updated on October 9, 2026 and ZoneTime on October 18, 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.*