# Gargantua: Black Hole Sim

> Gargantua: Black Hole Sim (iPhone/iPad app by Franky Fernandez.)

- Source: https://appshunter.io/ios/app/gargantua-black-hole-sim/id6786040292 (this page in markdown: same URL + `.md`)
- Developer: [Franky Fernandez](https://appshunter.io/developer/1842293810)
- Category: Education, Entertainment
- Price: Free
- Age rating: 4+
- Requires: iOS 26.5 · 8 MB
- Languages: American English
- Released: 2026-07-07
- Data updated: 2026-08-20
- User reviews in markdown: https://appshunter.io/ios/app/gargantua-black-hole-sim/id6786040292/reviews.md

## What is Gargantua?

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.


## Version history (last 1 release)

### 1.0 — 2026-07-07

No release notes.

## More apps by Franky Fernandez

- [LarderKeep](https://appshunter.io/ios/app/larderkeep/id6784898516)
- [CRUNCH: Studio Tycoon](https://appshunter.io/ios/app/crunch-studio-tycoon/id6785366868)
- [Benchwarden](https://appshunter.io/ios/app/benchwarden/id6786059205)
- [GlassBox Dev](https://appshunter.io/ios/app/glassbox-dev/id6786942147)

All apps by Franky Fernandez: https://appshunter.io/developer/1842293810

## Related topics

[black hole simulator](https://appshunter.io/ios/topics/black-hole-simulator) · [hyperbolic software](https://appshunter.io/ios/topics/hyperbolic-software)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-20.*