# Relativity Simulator

> Relativity Simulator (iPhone/iPad app by 际 郭.)

- Source: https://appshunter.io/ios/app/relativity-simulator/id6811289729 (this page in markdown: same URL + `.md`)
- Developer: [际 郭](https://appshunter.io/developer/6797282134)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 15 MB
- Languages: English
- Released: 2026-09-15
- Data updated: 2026-09-16
- User reviews in markdown: https://appshunter.io/ios/app/relativity-simulator/id6811289729/reviews.md

## What is Relativity Simulator?

Relativity Simulator is an interactive relativity toolkit built strictly on the axiomatic foundations of modern physics. There is no "hard sci-fi" here — every result traces back to the Lorentz transformation of special relativity or the Einstein field equations of general relativity, and is verified against numerical truth fixtures.

【Real physics, not imagination】
· 20 interactive modules covering core effects from special relativity to black holes, gravitational waves, and curved spacetime;
· Each module ships with precise charts, adjustable parameters, and a "Theory Card" with a fully visible derivation chain;
· All demo numbers are recomputed locally on your device from real CODATA constants — nothing is fabricated.

【Phenomena you can verify yourself】
· Gravitational time dilation: why clocks run faster up high — ~80 ns/day faster atop Everest, ~38 µs/day faster on GPS satellites;
· Twin paradox: fly to 4.22 light-years at 0.8c and the Earth twin ages 10.5 years while the traveler ages only 6.3;
· Tidal disruption: why you get stretched into "spaghetti" falling into a black hole — small holes tear you outside the horizon, supermassive ones only after you cross it;
· Plus light bending, gravitational lensing, the Schwarzschild horizon, frame dragging, and mass–energy equivalence E=mc².

【Built for learning and teaching】
· Volume-based progression: kinematics → gravitational field → black holes → cosmology → applications;
· Bilingual (zh/en) system notes ship with every effect: derivation, physical quantities, and references;
· Chinese / English UI follows your system language.

【Privacy first】
The app collects, stores, and transmits no personal data, embeds no third-party SDKs, and runs every computation locally on your device.

Whether you are studying, teaching, or simply curious, Relativity Simulator lets you actually run the "invisible spacetime" and watch it.


## Version history (last 1 release)

### 1.0 — 2026-09-15

No release notes.

## More apps by 际 郭

- [Gemology Notes](https://appshunter.io/ios/app/gemology-notes/id6797660418)
- [PuffComic](https://appshunter.io/ios/app/puffcomic/id6800779811)
- [ModelLens](https://appshunter.io/ios/app/modellens/id6805873122)
- [FossilNotes](https://appshunter.io/ios/app/fossilnotes/id6807045981)
- [Quantum Mechanics Notes](https://appshunter.io/ios/app/quantum-mechanics-notes/id6808079339)
- [QM Simulator: Quantum Physics](https://appshunter.io/ios/app/qm-simulator-quantum-physics/id6809480339)

All apps by 际 郭: https://appshunter.io/developer/6797282134

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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 2026-09-16.*