# DeltaClock vs ZoneTime

The clearest difference is iOS requirement: ZoneTime at 16.4 against DeltaClock's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. DeltaClock sells 3 in-app purchases, starting at $1.99 per month and ZoneTime sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

DeltaClock ships an update every 4 days, ZoneTime every 3 days. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | DeltaClock | ZoneTime |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 3 days** |
| Size | 24 MB | 51 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ameliia Shekikhacheva](https://appshunter.io/developer/1833150935) | [Meng-Yi Hsu](https://appshunter.io/developer/6783592735) |

## 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 |


### 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 DeltaClock free?

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

### Is ZoneTime free?

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

### Do DeltaClock or ZoneTime have ads?

Neither DeltaClock nor ZoneTime shows ads.

### Which is updated more often, DeltaClock or ZoneTime?

DeltaClock ships an update every 4 days, and ZoneTime every 3 days. Most recently, DeltaClock was updated on October 10, 2026 and ZoneTime on October 24, 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.*