# World Time Calc vs QuickCountdown

The clearest difference is in-app purchases: QuickCountdown at none against World Time Calc's 1. QuickCountdown also leads on ads (none vs shown) and iOS requirement (12.0 vs 16.0). On price, update cadence and device support there is nothing between them.

Both are free to download. World Time Calc sells 1 one-off in-app purchase. QuickCountdown asks for nothing beyond the download.

World Time Calc ships an update every 6 weeks, QuickCountdown every 2 months. The most recent releases landed on November 4, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | World Time Calc | QuickCountdown |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/world-time-calc-time-converter/id6472414655/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Ad-supported | — |
| Size | 10 MB | 16 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hajime Suzuki](https://appshunter.io/developer/1615906018) | [单 安](https://appshunter.io/developer/1703734519) |

## What reviewers say

### World Time Calc

[App page](https://appshunter.io/ios/app/world-time-calc-time-converter/id6472414655)

Visualize day/night cycles and working hours across different cities with an interactive timeline. Receive custom notifications for sunrise and sunset. Manually adjust work hours for precise scheduling.

**Highlights:** Day/night and working hour graphs, Automatic time updates, Manual work hour adjustment, Interactive time cursor, Sunrise/sunset alarm notifications

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PremiumPlan | $7.99 | one-time |


### QuickCountdown

[App page](https://appshunter.io/ios/app/quickcountdown/id6479987585)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is World Time Calc free?

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

### Is QuickCountdown free?

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

### Do World Time Calc or QuickCountdown have ads?

World Time Calc shows ads; QuickCountdown does not.

### Which is updated more often, World Time Calc or QuickCountdown?

World Time Calc ships an update every 6 weeks, and QuickCountdown every 2 months. Most recently, World Time Calc was updated on November 4, 2026 and QuickCountdown on November 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.*