Magnetica: Magnetic Field Sim

Magnetica turns your phone into a real-time magnetic field laboratory. Watch up to a million GPU-simulated particles react instantly to circular, bar, ring, horseshoe, and custom-shaped magnets — the way real iron filings do, except fully interactive and fully yours to shape.

WHY MAGNETICA
🧲 Real magnetic field physics, simulated live on your GPU — not a pre-rendered video or animation
⚡ Electromagnets with Pulse and Alternating-Polarity modes, each with adjustable frequency
🎨 An unlimited Sandbox for building your own magnet layouts from scratch
🌌 14 ready-made scenes, from Iron Filings and Magnetic Storm to Galaxy Magnet, Black Hole Magnet, and Aurora
📊 Field Arrows, Heat Map, and Field Line visualizations for a deeper look at how a magnetic field actually behaves
🎓 Educational Mode labels every pole and shows live particle, magnet, and frame-rate stats — built for physics students and teachers
📸 Save every layout to your personal Gallery, then export a still image in PNG or WEBP, up to 4K resolution
🎥 A cinematic camera mode that slowly drifts and zooms for an ambient, screensaver-style view
📱 Tilt your device to steer gravity in real time
⚙️ Deep physics controls: gravity, air resistance, friction, turbulence, field falloff, magnetic permeability, particle mass, and simulation speed

HOW IT WORKS
Every particle on screen is simulated on the GPU, every frame, reacting to the exact position, strength, shape, and polarity of every magnet you place — so nothing you see is scripted. Drag a magnet and the whole field reshapes itself instantly. Flip its polarity and watch particles scatter and reform. Add an electromagnet and see the field pulse in real time.

WHO IT'S FOR
Students trying to build intuition for magnetism. Teachers who want a live classroom demo instead of a diagram. Hobbyists who just find satisfying particle simulations relaxing to watch. Magnetica is a physics sandbox, a science teaching tool, and a mesmerizing simulator, all in one small app.

FREE TO START
Magnetica is free to download. Place a Circular magnet, try the Iron Filings preset, turn on Field Arrows, and export your first image in Standard PNG — no account, no paywall for your first look.

Magnetica Premium unlocks:
- Unlimited magnets, in every shape — Bar, Ring, Horseshoe, and Custom included
- All 14 Simulation Presets
- Heat Map and Field Line visualizations
- 4K resolution and WEBP export

Build a magnetic storm. Trace a field line by hand. Watch a galaxy of iron filings settle into orbit around a black hole magnet. Magnetica is a magnetic field simulator, a physics simulation app, and a particle-based science toy — download it and start experimenting.