# Ctzone vs DeltaClock

The clearest difference is in-app purchases: Ctzone at none against DeltaClock's 3. DeltaClock's advantage is update cadence (every 4 days vs every 4 weeks). On price, ads, device support and iOS requirement there is nothing between them.

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

Ctzone ships an update every 4 weeks, DeltaClock every 4 days. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Ctzone | DeltaClock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 4 days** |
| Size | 18 MB | 24 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Ali An Nuur](https://appshunter.io/developer/1814014911) | [Ameliia Shekikhacheva](https://appshunter.io/developer/1833150935) |

## What reviewers say

### Ctzone

[App page](https://appshunter.io/ios/app/ctzone/id6748931770)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Ctzone free?

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

### Is DeltaClock free?

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

### Do Ctzone or DeltaClock have ads?

Neither Ctzone nor DeltaClock shows ads.

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

Ctzone ships an update every 4 weeks, and DeltaClock every 4 days. Most recently, Ctzone was updated on October 9, 2026 and DeltaClock on October 10, 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.*