Gravity! vs Quantum
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gravity!
Simulate the forces of gravity by flinging particles and observing their interactions. Create celestial bodies like planets and black holes, and customize their properties. Explore vast cosmic simulations with intuitive zoom and pan controls.
- Gravity simulation
- Particle interaction
- Create solar systems
- Add black holes
- Adjust particle properties
- Zoom and pan controls
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This app simulates the effects of gravity. You can fling particles at each other and watch them interact. Create solar systems and galaxies! Make a planet and fling asteroids into it! Add a black hole and watch everything get sucked in! You can adjust the size, mass, and color of the particles! Zoom in and out and look around with two fingers! App Preview Music: "Mesmerizing Galaxy " Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 4.0 License http://creativecommons.org/licenses/by/4.0/
Quantum
Explore the hidden world of particles with a real-time simulator. Model up to 10,000 particles and experiment with natural phenomena like crystallization and orbital mechanics. Customize interactions and visualize results dynamically.
- Real-time particle simulation
- Model up to 10,000 particles
- Simulate natural phenomena
- Four distinct particle classes
- Customizable rules editor
- Dynamic visualizations
- Interactive control
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Experience the hidden world of particles Quantum is a real-time particle life sandbox for exploring emergent motion, artificial physics, and complex systems. Build fields with up to 10,000 particles, tune how classes attract or repel each other, and watch simple rules turn into flowing structures, swarms, or chaotic patterns. Why Quantum stands out: - Real-time particle simulation with four interacting particle classes. - Seamless 2D fields and perspective 3D volumes with touch rotation. - Rule editor for custom attraction and repulsion matrices. - Temperature, viscosity, solid/fluid edge behavior, and force tools. - Black hole and white hole tools for live interaction. - Save and load fields, rule sets, and color schemes. - P3 color support and vivid visual presets for generative art. Use Quantum as a physics toy, creative sandbox, teaching aid, or generative art lab. It is built for people who enjoy science, cellular automata, n-body systems, chaos, and beautiful simulations.
Screenshots
Verdict
The clearest difference is rating: Quantum at 4.8 against Gravity!'s 3.9. Quantum also leads on review sentiment (86% vs 74%) and ratings volume (133 vs 18). Gravity!'s advantage is iOS requirement (15.6 vs 26.0). On price, update cadence, ads and in-app purchases 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. Gravity! sells 1 one-off in-app purchase and Quantum sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Quantum holds the better App Store score, 4.8 against 3.9. That said, the two scores are not equally well evidenced: Quantum has 133 ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 74% of Gravity!'s written reviews are positive against 86% of Quantum's.
Gravity! ships an update every 2 months, Quantum every 5 weeks. The most recent releases landed on August 6, 2026 and September 23, 2026 respectively.
| Parameter | Gravity! | Quantum |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (18 ratings) | 4.8 (133 ratings) — better |
| Positive reviews | 73.5% of reviews | 85.7% of reviews — better |
| Number of ratings | 18 | 133 — better |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 17 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Marc Davis | GEORGY OSTROBROD |
Customer experience
Gravity!
Quantum
In-app purchases
Gravity!
- Gravity! Extended Edition$0.99
Quantum
- Developer tip2 variants$1.99
- Developer tip2 variants$3.99
- Developer tip2 variants$5.99









