Comparison

Clavis vs Ish Clock

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Clavis

Features
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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. โ€ข Current planetary hour โ€” see which planet rules right now, with a live countdown to the next hour. โ€ข Apple Watch โ€” 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. โ€ข Widgets โ€” 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. โ€ข Ruler of the day โ€” the classical planet that governs today. โ€ข Upcoming hours โ€” a clear timeline of the planetary hours ahead, from sunrise to sunset and through the night. โ€ข Moon phase โ€” the current phase and illumination of the Moon. โ€ข Monthly calendar โ€” lunar phases and planetary hours at a glance. โ€ข 3D chart โ€” your birth chart rendered in three dimensions, with transits and aspects. โ€ข Clavis AI (optional subscription) โ€” ask about the ruler of the hour, today's events or a planet in your chart; nothing is sent until you agree. โ€ข Sync across devices โ€” sign in and your calendar and chart settings follow you. Planetary Clock is free: the hours, the calendar, the 3D chart, the widgets and the Apple Watch app need no subscription. The optional Clavis AI subscription, monthly or annual with a free trial when your Apple Account is eligible, adds an assistant that answers questions about your day, the planetary hours and your chart, in the tone of the traditions. No ads, and no tracking. If you prefer not to subscribe, you can support the app with a tip, which unlocks nothing, or with a support pass that unlocks Clavis AI for 30 or 90 days, with no automatic renewal. Signing in with Apple or Google keeps your data in step across your devices. You pick your city by searching for it โ€” the app does not use GPS โ€” 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/

About

Ish Clock

Features
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The internet's oldest fuzzy clock, since 1994. Now on your personal supercomputer! Ish Clock fills your screen with the time in plain English โ€” roughly. No numbers, no hands, no stress. Just a calm reminder of where you are in the day. Pairs with the Ish Clock Apple Watch app and complication.

Screenshots

Clavis4 screens
Ish Clock3 screens

Verdict

The call

The clearest difference is in-app purchases: Ish Clock at none against Clavis's 5. On price, update cadence, ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Clavis sells 5 in-app purchases, starting at $4.99 per month. Ish Clock asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 days. Both last shipped on November 5, 2026.

Scorecard1 real difference ยท 5 level
Clavis versus Ish Clock: the parameters behind the verdict, then further details
ParameterClavisIsh Clock
PriceFreeFree
Update frequencyEvery 4 daysEvery 4 days
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Apple Watch
Requires iOS17.217.0 โ€” better
Further details โ€” not scored
Size43 MB1 MB
Age rating4+4+
DeveloperPedro Henrique Oliveira SousaROGER DUBAR

In-app purchases

5 purchases

Clavis

Subscriptions2
  • Clavis AI Monthly3 Days trial$4.991 Month
  • Clavis AI Yearly3 Days trial$29.991 Year
One-time3
  • Tip$1.99
  • Support + 30 days of AI$5.99
  • Support + 90 days of AI$14.99
None

Ish Clock

No in-app purchases

Questions

Is Clavis free?
Clavis is free to download, with in-app purchases available.
Is Ish Clock free?
Ish Clock is free to download, with no in-app purchases.
Do Clavis or Ish Clock have ads?
Neither Clavis nor Ish Clock shows ads.
Which is updated more often, Clavis or Ish Clock?
Clavis ships an update every 4 days, and Ish Clock every 4 days. Most recently, Clavis was updated on November 5, 2026 and Ish Clock on November 5, 2026.

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