# Gargantua: Black Hole Sim

> Education

Canonical page: [https://chrome-stats.com/d/id6786040292](https://chrome-stats.com/d/id6786040292)

## Overview

- **ID:** `id6786040292`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Franky Fernandez
- **Category:** Education
- **Rating:** 5.00 / 5 (3 ratings)
- **Version:** 1.0
- **Last updated:** 2026-07-07
- **First published:** 2026-07-07
- **Size:** 7.65 MB
- **Data as of:** 2026-09-04
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/gargantua-black-hole-sim/id6786040292)
- **Privacy policy:** [https://gargantua-privacy.fernandezfranky3.workers.dev](https://gargantua-privacy.fernandezfranky3.workers.dev/)

## Description

Collide galaxies, watch supermassive black holes spiral together and merge, and fly around a lensed black hole — all in real time, all from real physics.

Gargantua is a real-time galaxy-collision and supermassive-black-hole simulator that runs entirely on your device's GPU — and every pixel is driven by actual physics, not a pre-rendered animation.

Spin up a spiral galaxy, smash two galaxies together and watch tidal tails and bridges form, or follow a pair of supermassive black holes as they spiral in, chirp, and merge into a spinning Kerr remnant. Then fly around a black hole and see its accretion disk wrap over the shadow in the gravitationally-lensed "Interstellar" view.

REAL PHYSICS, LIVE
• Newtonian N-body gravity with a Barnes-Hut octree, on Metal GPU compute
• Exponential-disk galaxies with a true Freeman rotation curve and a persistent spiral density wave
• Dark-matter halos, dynamical friction, SPH gas, radiative cooling, and star formation
• Black-hole binary inspiral handoff to the analytic Peters chirp + Kerr remnant
• Backward-ray-traced gravitational lensing (Schwarzschild to Kerr spin) with a Doppler-beamed disk

MODES
• Single spiral galaxy
• Two-galaxy collision (stars, or full physics with gas + dark matter + black holes)
• Supermassive black-hole merger finale, with a gravitational-wave ripple
• Gravitational lensing — the black-hole shot

TOUCH CONTROLS
• Drag to orbit, pinch to zoom, two-finger pan
• Live speed, pause, quality, and black-hole spin / accretion-disk controls
• Tap Share to save or send a high-resolution image of your view

Universal — looks gorgeous on iPhone and iPad.

## Rankings

- #538,973 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6786040292)