# DeltaClock vs TimeZone Expert

The clearest difference is in-app purchases: TimeZone Expert at none against DeltaClock's 3. 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. TimeZone Expert asks for nothing beyond the download.

DeltaClock ships an update every 4 days, TimeZone Expert every 5 days. The most recent releases landed on September 8, 2026 and July 21, 2026 respectively.

## The numbers

| Metric | DeltaClock | TimeZone Expert |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 days |
| Size | 24 MB | 14 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) | [Po-Han Chen](https://appshunter.io/developer/6785743236) |

## 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 |


### TimeZone Expert

[App page](https://appshunter.io/ios/app/timezone-expert/id6785743234)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is DeltaClock free?

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

### Is TimeZone Expert free?

TimeZone Expert is free to download, with no in-app purchases.

### Do DeltaClock or TimeZone Expert have ads?

Neither DeltaClock nor TimeZone Expert shows ads.

### Which is updated more often, DeltaClock or TimeZone Expert?

DeltaClock ships an update every 4 days, and TimeZone Expert every 5 days. Most recently, DeltaClock was updated on September 8, 2026 and TimeZone Expert on July 21, 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.*