Clavis vs World Clock with Aurora
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Clavis
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Planetary Clock is a precise, beautifully simple planetary-hours clock. Since antiquity, each day and night has been divided into twelve unequal hours, each governed by one of the seven classical planets in the Chaldean order. Planetary Clock computes these hours with astronomical accuracy from the true sunrise and sunset in the city you choose. ⢠Current planetary hour ā see which planet rules right now, with a live countdown to the next hour. ⢠Apple Watch ā the ruling planet and the minutes left in this hour, right on your watch face and in the Smart Stack. Hours are computed on the watch, so it works even when your iPhone is out of reach. ⢠Widgets ā the ruling planet and the minutes left in this hour on your Home Screen and Lock Screen, with the hours ahead and the whole day in the larger sizes. ⢠Ruler of the day ā the classical planet that governs today. ⢠Upcoming hours ā a clear timeline of the planetary hours ahead, from sunrise to sunset and through the night. ⢠Moon phase ā the current phase and illumination of the Moon. ⢠Monthly calendar ā lunar phases and planetary hours at a glance. ⢠3D chart ā your birth chart rendered in three dimensions, with transits and aspects. ⢠Sync across devices ā sign in and your calendar and chart settings follow you. Planetary Clock is a subscription app. A monthly or annual plan unlocks everything, with a free trial when your Apple Account is eligible. No ads, and no tracking. Signing in with Apple or Google keeps your data in step across your devices. You pick your city by searching for it ā the app does not use GPS ā and every planetary hour is computed from that city's coordinates and time zone, so the same place is used on every device. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
World Clock with Aurora
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World Clock Aurora is a beautifully designed world clock that helps you feel the time of each city, not just read it. Each city card reflects the city's current sky, from sunrise and daytime to sunset, twilight, night, clouds, rain, and aurora activity. Compare time zones visually, check local weather, and see sunrise, sunset, moonrise, and moonset details in one place. Features: ⢠World clock with immersive live sky cards ⢠Current local time for your favorite cities ⢠Weather, temperature, and sky conditions ⢠Sunrise, sunset, moonrise, and moonset times ⢠Aurora forecast with KP index and visibility by latitude ⢠City search with continent filters ⢠Time difference comparison between cities ⢠Custom home city, language, time format, and temperature unit settings ⢠iOS home screen widget support ⢠Tap any city to open a detail sheet with a big clock, weather, sunrise/sunset, moonrise/moonset, and aurora forecast ⢠Check the 7-day weather forecast Whether you are planning meetings, tracking family abroad, following travel destinations, or watching aurora conditions around the world, World Clock Aurora makes global time feel intuitive and alive.
Screenshots
Verdict
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.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
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.
| Parameter | Clavis | World Clock with Aurora |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days ā better | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 17.2 | 13.0 ā better |
| Further details ā not scored | ||
| Size | 39 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Pedro Henrique Oliveira Sousa | Hangik Lee |
In-app purchases
Clavis
No in-app purchases
World Clock with Aurora
No in-app purchases
Questions
Is Clavis free?
Is World Clock with Aurora free?
Do Clavis or World Clock with Aurora have ads?
Which is updated more often, Clavis or World Clock with Aurora?
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