Space Crash Simulator

Mobile SPH planetary collision simulator — with real‑time particle physics

Space Crash Simulator is the first mobile app with Smoothed Particle Hydrodynamics (SPH) for planetary collisions. Watch as planets collide and break apart in real time, with a robust simulation running a decent number of particles for a detailed, physics-based simulation..

The simulation lets you jump straight into high-energy collisions or customize initial conditions in Setup Mode. Adjust parameters like particle count, planet velocity, and collision accuracy to create your own collision scenarios.

SPH simulations are notoriously resource intensive but settings like particle count, accuracy and timescale can be adjusted to allow even weaker devices to run it.

What's New in the Latest Version 0.10

Last updated on Mar 9, 2025 - You can now add black holes. Just reduce the particle count of any planet to 1, and you'll be able to increase the particle mass to a very high number, creating a black hole
- Updated lava effect (shockwave)
- Fixed bug with proto-planetary disk not having initial spin