Comparison

Probability vs Planetary Hours

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

Head to head
About

Probability

Features
Read full description

Probability Calculate the probability of conditional events or unconditional events. Conditional events Example: What is the probability of throwing one six with a dice in throw number two with the condition that throw one was a six. Unconditional events Example: What is the probability that it will be some six in two throws with a dice whether it is throw number one or two. Up to ten events can be linked together.

About

Planetary Hours

This app provides a dynamic clock that displays planetary hours, adapting to the natural flow of the sun. It offers real-time calculations based on your location and supports various iOS features like Live Activities and Apple Watch complications for at-a-glance timing updates.

Highlights
  • Dynamic Island & Live Activities
  • Apple Watch Complications
  • StandBy & Lock Screen Widgets
  • Interactive Home Screen Widgets
  • Precision Astronomy Calculations
  • Offline Processing
  • Customizable Notifications
Features
Read full description

Unlock the ancient rhythm of time with Planetary Hours. Unlike standard mechanical clocks, planetary hours adapt to the natural flow of the sun, dividing day and night into unequal segments ruled by the seven classical planets. Whether you practice electional astrology, planetary magic, or simply wish to align your schedule with cosmic rhythms, this app is your precision tool. EXCLUSIVE iOS FEATURES We leverage the full power of your device to keep you in sync without opening the app: Dynamic Island & Live Activities Track the current planetary ruler and remaining time instantly from your Lock Screen or Dynamic Island. Never miss a transition again. Pro Apple Watch Experience • Complications: Rich data on your wrist. See the current planet, symbol, and countdown directly on your favorite watch face (Modular, Infograph, Circular supported). • Standalone App: Fully functional on Apple Watch, no iPhone needed nearby. StandBy & Lock Screen Widgets Turn your iPhone into a magical altar clock at night. Our StandBy widgets look stunning on your nightstand, while Lock Screen widgets give you at-a-glance timing updates. Interactive Home Screen Widgets Beautiful, data-rich widgets that adapt to Light and Dark mode. View the current hour, next transition, and day/night progress directly from your Home Screen. CORE FEATURES • Precision Astronomy: Real-time calculation based on your exact GPS coordinates and local sunrise/sunset. • Chaldean Order: Accurate sequence for all 7 classical planets (Saturn to Moon). • Privacy First: All calculations happen offline on your device. No tracking, no data collection. • Notification System: Get notified exactly when the planetary hour changes. Download now to synchronize your life with the solar rhythm.

Screenshots

Probability2 screens
Planetary Hours4 screens

Verdict

The call

The clearest difference is price: Probability at Free against Planetary Hours's $4.99. Probability also leads on iOS requirement (9.0 vs 17). Planetary Hours's advantage is update cadence (monthly vs every 18 months). On ads, in-app purchases and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Probability is free to download; Planetary Hours costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Probability ships an update every 18 months, Planetary Hours monthly. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Probability versus Planetary Hours: the parameters behind the verdict, then further details
ParameterProbabilityPlanetary Hours
PriceFree — better$4.99
Rating—4.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 18 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPodiPhone, iPad, Apple Watch — better
Requires iOS9.0 — better17
Further details — not scored
Size1 MB16 MB
Age rating4+4+
Developerdomesticusdevelop雪 蔺

In-app purchases

None

Probability

No in-app purchases

None

Planetary Hours

No in-app purchases

Questions

Is Probability free?
Probability is free to download, with no in-app purchases.
Is Planetary Hours free?
Planetary Hours costs $4.99, with no in-app purchases.
Do Probability or Planetary Hours have ads?
Neither Probability nor Planetary Hours shows ads.
Which is updated more often, Probability or Planetary Hours?
Probability ships an update every 18 months, and Planetary Hours monthly. Most recently, Probability was updated on October 27, 2026 and Planetary Hours on October 24, 2026.

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