# DeltaClock vs Zonal Time

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

Both are free to download. DeltaClock sells 3 in-app purchases, starting at $1.99 per month. Zonal Time asks for nothing beyond the download.

DeltaClock ships an update every 4 days, Zonal Time every 2 days. Both last shipped on September 8, 2026.

## The numbers

| Metric | DeltaClock | Zonal Time |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 2 days** |
| Size | 24 MB | 11 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ameliia Shekikhacheva](https://appshunter.io/developer/1833150935) | [Rami AlZaid](https://appshunter.io/developer/1865252233) |

## 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 |


### Zonal Time

[App page](https://appshunter.io/ios/app/zonal-time/id6761438016)

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

**In-app purchases:** none


## Frequently asked questions

### Is DeltaClock free?

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

### Is Zonal Time free?

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

### Do DeltaClock or Zonal Time have ads?

Neither DeltaClock nor Zonal Time shows ads.

### Which is updated more often, DeltaClock or Zonal Time?

DeltaClock ships an update every 4 days, and Zonal Time every 2 days. Most recently, DeltaClock was updated on September 8, 2026 and Zonal Time on September 8, 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.*