# DeltaClock vs ONE WATCH

DeltaClock and ONE WATCH are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. DeltaClock sells 3 in-app purchases, starting at $1.99 per month 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.

DeltaClock ships an update every 4 days, ONE WATCH every 3 days. The most recent releases landed on October 10, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | DeltaClock | ONE WATCH |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 3 days** |
| Size | 24 MB | 52 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Ameliia Shekikhacheva](https://appshunter.io/developer/1833150935) | [Johann Szebeni](https://appshunter.io/developer/1880746405) |

## What reviewers say

### DeltaClock

[App page](https://appshunter.io/ios/app/deltaclock-time-zone-planner/id6751021160)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Subscription Monthly | $1.99 | per month |
| Pro Subscription Annual | $9.99 | per year |
| Lifetime purchase | $24.99 | one-time |


### 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 DeltaClock free?

DeltaClock 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 DeltaClock or ONE WATCH have ads?

Neither DeltaClock nor ONE WATCH shows ads.

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

DeltaClock ships an update every 4 days, and ONE WATCH every 3 days. Most recently, DeltaClock was updated on October 10, 2026 and ONE WATCH on October 28, 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.*