# Clavis vs World Clock with Aurora

The clearest difference is update cadence: Clavis at every 4 days against World Clock with Aurora's fortnightly. World Clock with Aurora's advantage is iOS requirement (13.0 vs 17.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Clavis ships an update every 4 days, World Clock with Aurora fortnightly. The most recent releases landed on October 23, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Clavis | World Clock with Aurora |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Fortnightly |
| Size | 39 MB | 26 MB |
| Requires iOS | 17.2 | **13.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pedro Henrique Oliveira Sousa](https://appshunter.io/developer/1875393541) | [Hangik Lee](https://appshunter.io/developer/1893677570) |

## What reviewers say

### Clavis

[App page](https://appshunter.io/ios/app/clavis-planetary-clock/id6758866461)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### World Clock with Aurora

[App page](https://appshunter.io/ios/app/world-clock-with-aurora/id6762291120)

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

**In-app purchases:** none


## Frequently asked questions

### Is Clavis free?

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

### Is World Clock with Aurora free?

World Clock with Aurora is free to download, with no in-app purchases.

### Do Clavis or World Clock with Aurora have ads?

Neither Clavis nor World Clock with Aurora shows ads.

### Which is updated more often, Clavis or World Clock with Aurora?

Clavis ships an update every 4 days, and World Clock with Aurora fortnightly. Most recently, Clavis was updated on October 23, 2026 and World Clock with Aurora on October 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.*