Comparison

Planetary Hours vs SlimTimer

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

Head to head
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.

About

SlimTimer

Features
Read full description

SlimTimer is a fast, simple, and convenient countdown timer for work, study, breaks, workouts, cooking, and everyday reminders. Start a timer with a single tap from the app, a Home Screen widget, or a Lock Screen widget. While the timer is running, Live Activities let you check the remaining time directly from the Lock Screen and Dynamic Island without reopening the app (Requires iOS 16.2 or later). SlimTimer is designed around speed and convenience: choose a duration, tap once, and get back to what you are doing. Key features: - Quick countdown presets for commonly used durations. - Dedicated Home Screen widgets for instant timers. - Circular Lock Screen widgets with one-tap start. - Live Activities on the Lock Screen and Dynamic Island. - Automatically opens the app, sets the duration, and starts the timer when you tap a widget. - Audio alerts when time is up. - Optional automatic repeat. - Clear light and dark themes. - Lightweight design focused on speed and ease of use. SlimTimer — one tap to start, always easy to check.

Screenshots

Planetary Hours4 screens
SlimTimer4 screens

Verdict

The call

The clearest difference is price: SlimTimer at Free against Planetary Hours's $4.99. SlimTimer also leads on update cadence (every 9 days vs monthly) and iOS requirement (15.0 vs 17). Planetary Hours's advantage is in-app purchases (none vs 2). On ads 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

SlimTimer is free to download; Planetary Hours costs $4.99 up front. SlimTimer sells 2 one-off in-app purchases. Planetary Hours asks for nothing beyond the download.

UpkeepUpdate frequency

Planetary Hours ships an update monthly, SlimTimer every 9 days. The most recent releases landed on October 15, 2026 and October 1, 2026 respectively.

Scorecard4 real differences · 6 level
Planetary Hours versus SlimTimer: the parameters behind the verdict, then further details
ParameterPlanetary HoursSlimTimer
Price$4.99Free — better
Rating4.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyMonthlyEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS1715.0 — better
Further details — not scored
Size16 MB8 MB
Age rating4+4+
Developer雪 蔺Luan Cu Xuan

In-app purchases

None

Planetary Hours

No in-app purchases

2 purchases

SlimTimer

One-time2
  • Remove Ads$1.99
  • Remove ads$1.99

Questions

Is Planetary Hours free?
Planetary Hours costs $4.99, with no in-app purchases.
Is SlimTimer free?
SlimTimer is free to download, with in-app purchases available.
Do Planetary Hours or SlimTimer have ads?
Neither Planetary Hours nor SlimTimer shows ads.
Which is updated more often, Planetary Hours or SlimTimer?
Planetary Hours ships an update monthly, and SlimTimer every 9 days. Most recently, Planetary Hours was updated on October 15, 2026 and SlimTimer on October 1, 2026.

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