Celestial Dances vs F.A.S.T
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Celestial Dances
Explore the orbital mechanics of planets, moons, and exoplanets. This app visualizes celestial movements based on concepts from "A Little Book of Coincidence." Discover intriguing patterns and relationships within our solar system and beyond.
- Explore solar system planet motions
- Visualize moon orbits
- Discover exoplanet systems
- Based on 'A Little Book of Coincidence'
- Highlights Earth-Venus relationship
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This app invites you to explore the relative motions of our solar system's planets, their moons, and several exoplanet systems. It is based on ideas presented in "A Little Book of Coincidence" by John Martineau. Are the amazing patterns created by these orbiting bodies just a coincidence, or is something more than that going on? Take a look and see what you think. Be sure to check out the special relationship between the Earth and Venus.
F.A.S.T
Create and customize mesmerizing mathematical spirals, including Archimedean and logarithmic forms. Offers intuitive controls for precise adjustments to curvature, color, and patterns. Ideal for creative discovery and educational exploration.
- Archimedean & Logarithmic Spirals
- Intuitive Controls
- Dynamic Colorization
- Expert Mode
- Dark Mode Support
- Cross-device Compatibility
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F.A.S.T (Fancy Archimedean Spiral Tool) Unlock the world of mesmerizing spirals with F.A.S.T – your ultimate tool for creating, exploring, and customizing beautiful mathematical spirals. Whether you're captivated by the elegance of curves or fascinated by the geometry of logarithmic and Archimedean spirals, F.A.S.T offers you endless possibilities for creative discovery. Key Features: - Archimedean & Logarithmic Spirals: Dive into the classic forms of Archimedean spirals or the distinctive beauty of logarithmic (Bernoulli) spirals, each customizable to perfection. - Intuitive Controls: Adjust arc length, separation, rotation, segment count, and even color to create spirals that are uniquely yours. Every control slider is designed to let you shape each aspect with precision, from the spiral's curvature to the color that brings it to life. - Dynamic Colorization: Explore the full hue spectrum with seamless color transitions that allow you to bring your spirals to life in vibrant ways. From soft gradients to intense shades, your creations can be as colorful as you wish. - Expert Mode: Ready to go beyond? Activate Expert Mode and access advanced options that make every tweak feel like an art form. Experiment with rotations, mirrored patterns, and detailed configurations to find the perfect look. - Dark Mode & More: Customize your workspace with Dark Mode, make high-contrast visualizations, and adjust your settings to fit your unique style. F.A.S.T has been built to look great on both iPhone and iPad, adapting seamlessly to your device's orientation and dark/light settings. - Made for All Ages: Ideal for curious minds of all ages, F.A.S.T offers easy-to-use controls that make it engaging for young explorers and a true creative outlet for geometry enthusiasts. Whether you're creating spirals for inspiration, education, or pure enjoyment, F.A.S.T provides a delightful environment to explore the world of curves. For a lighter experience for children and babies, be sure to check out "F.A.S.T Baby" for simpler, touch-friendly spirals. Discover the beauty of mathematics and design. Let F.A.S.T inspire your creativity today!
Screenshots
Verdict
The clearest difference is rating: F.A.S.T at 4.6 against Celestial Dances's 3.0. F.A.S.T also leads on ratings volume (25 vs 2) and device support (3 vs 1). Celestial Dances's advantage is iOS requirement (9.0 vs 15.6). On price, review sentiment, update cadence and ads 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
F.A.S.T holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: F.A.S.T has 25 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
Celestial Dances ships an update every 30 months, F.A.S.T every 19 months. The most recent releases landed on November 1, 2026 and November 13, 2026 respectively.
| Parameter | Celestial Dances | F.A.S.T |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) | 4.6 (25 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 2 | 25 — better |
| Update frequency | Every 30 months | Every 19 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 16 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Bretl | Philippe Zay |
Customer experience
Celestial Dances
F.A.S.T
In-app purchases
Celestial Dances
No in-app purchases
F.A.S.T
No in-app purchases
