# World Clock vs Solution Calculator

The clearest difference is in-app purchases: Solution Calculator at none against World Clock's 1. Solution Calculator also leads on update cadence (every 6 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. World Clock sells 1 one-off in-app purchase. Solution Calculator asks for nothing beyond the download.

World Clock ships an update fortnightly, Solution Calculator every 6 days. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | World Clock | Solution Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 6 days** |
| Size | 2 MB | 2 MB |
| Requires iOS | 17.6 | **16.6** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [Mehmet Erdem Devge](https://appshunter.io/developer/1464750482) | [XING WU](https://appshunter.io/developer/1896624836) |

## What reviewers say

### World Clock

[App page](https://appshunter.io/ios/app/world-clock-time-zone-tracker/id6738009591)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Features- Lifetime | $1.99 | one-time |


### Solution Calculator

[App page](https://appshunter.io/ios/app/solution-calculator/id6769040029)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is World Clock free?

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

### Is Solution Calculator free?

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

### Do World Clock or Solution Calculator have ads?

Neither World Clock nor Solution Calculator shows ads.

### Which is updated more often, World Clock or Solution Calculator?

World Clock ships an update fortnightly, and Solution Calculator every 6 days. Most recently, World Clock was updated on October 13, 2026 and Solution Calculator on October 6, 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.*