Clavis vs GPF Bubble Level
Price, ratings, monetisation and update history for both apps, side by side โ 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. โข Current planetary hour โ see which planet rules right now, with a live countdown to the next hour. โข Ruler of the day โ the classical planet that governs today. โข Upcoming hours โ a clear timeline of the planetary hours ahead, from sunrise to sunset and through the night. โข Moon phase โ the current phase and illumination of the Moon. โข Monthly calendar โ lunar phases and planetary hours at a glance. โข 3D chart โ your birth chart rendered in three dimensions, with transits and aspects. โข Sync across devices โ 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 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/
GPF Bubble Level
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GPF Bubble Level is a minimal, high-contrast spirit level app for iPhone, built around real-time accelerometer data. It uses Core Motion to read device gravity and translates movement into a smooth on-screen bubble inside a circular level grid. The interface is intentionally clean: black background, white elements, Menlo typography, and a compact layout designed for quick visual alignment in everyday use. Key features: - Real-time level detection using accelerometer/device motion - Smooth bubble movement with light filtering for stability - Tilt angle readout in degrees - Live X/Y gravity values for reference - Dedicated Info screen with app icon, title, and version/build footer - Custom monochrome app icon (white on black) consistent with the app style Design goals: - Fast glanceability - No clutter - Strong visual contrast for indoor/outdoor visibility - Coherent monochrome identity across UI and iconography Technical notes: - SwiftUI-based UI - CoreMotion integration via observable motion manager - Motion privacy usage description configured - Build/version shown directly from bundle metadata This app is ideal for quick leveling checks on surfaces, shelves, frames, and small DIY tasks, with a focused UX that prioritizes readability and responsiveness.
Screenshots
Verdict
The clearest difference is iOS requirement: Clavis at 16.2 against GPF Bubble Level's 18.6. On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Clavis | GPF Bubble Level |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days | โ |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad โ better | iPhone |
| Requires iOS | 16.2 โ better | 18.6 |
| Further details โ not scored | ||
| Size | 24 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | Pedro Henrique Oliveira Sousa | Gian Paolo Fontani |
In-app purchases
Clavis
No in-app purchases
GPF Bubble Level
No in-app purchases
Questions
Is Clavis free?
Is GPF Bubble Level free?
Do Clavis or GPF Bubble Level have ads?
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