Clavis vs NightlyStar
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Clavis
Read full descriptionHide full description
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. β’ Current planetary hour β see which planet rules right now, with a live countdown to the next hour. β’ Apple Watch β 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. β’ Widgets β 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. β’ Ruler of the day β the classical planet that governs today. β’ Upcoming hours β a clear timeline of the planetary hours ahead, from sunrise to sunset and through the night. β’ Moon phase β the current phase and illumination of the Moon. β’ Monthly calendar β lunar phases and planetary hours at a glance. β’ 3D chart β your birth chart rendered in three dimensions, with transits and aspects. β’ Sync across devices β 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 β the app does not use GPS β 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/
NightlyStar
Read full descriptionHide full description
NightlyStar turns early sleep check-ins into a quiet pact with the night sky. Each evening, record your sleep rhythm and light a star that belongs to you. Enter your birth time and city to reveal your natal chart, synastry, planetary transits, and Mercury retrograde messages. The Sun, Moon, rising sign, and planetary aspects form a hidden celestial map of temperament, attraction, emotional tides, and the unseen rhythm of your present path. Read the stars. Return to yourself. Let sleep become a ritual.
Screenshots
Verdict
The clearest difference is in-app purchases: Clavis at none against NightlyStar's 4. Clavis also leads on ads (none vs shown) and update cadence (every 4 days vs every 11 days). NightlyStar's advantage is iOS requirement (13.0 vs 17.2). On price and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. NightlyStar sells 4 in-app purchases, starting at $4.99 per month. Clavis asks for nothing beyond the download.
Clavis ships an update every 4 days, NightlyStar every 11 days. The most recent releases landed on October 23, 2026 and October 9, 2026 respectively.
| Parameter | Clavis | NightlyStar |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days β better | Every 11 days |
| Ads | No β better | Yes |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPad, Apple Watch β better | iPhone, iPod |
| Requires iOS | 17.2 | 13.0 β better |
| Further details β not scored | ||
| Size | 39 MB | 44 MB |
| Age rating | 4+ | 12+ |
| Developer | Pedro Henrique Oliveira Sousa | ζΉεηιΈθΎη§ζ |
In-app purchases
Clavis
No in-app purchases
NightlyStar
- Cosmic Access β Monthly$4.991 Month
- Nightly Star Premium Monthly$9.991 Month
- Cosmic Access β Yearly$39.991 Year
Show 1 moreShow fewer
- Nightly Star Premium Yearly$59.991 Year









