1.25
Lorentz factor γ
Real-Time Relativity Engine
Bend spacetime.
Bend spacetime.
Chase your own worldline.
Chrono Paradoxer is an interactive computational sandbox for visualizing Minkowski diagrams, modeling relativistic paradoxes, and calculating causality dynamics — all in real time, entirely on your device.
0msnetwork round-trip
cthe only speed limit that matters
∞reference frames explorable
Core Capabilities
A physics lab that fits in your pocket.
Every tool a spacetime diagram deserves — rendered instantly, calculated precisely, and kept entirely under your control.
Minkowski Diagrams
Draw and manipulate full spacetime diagrams with light cones, worldlines, and simultaneity planes that update live as you change frames.
Relativistic Paradoxes
Step through the twin paradox, the ladder paradox, and other classic thought experiments with adjustable velocities and clear visual proofs.
Causality Dynamics
Explore which events can influence which others by mapping past and future light cones, and see causal order shift across reference frames.
Real-Time Sandbox
Every slider, drag, and boost recalculates instantly — no render queue, no lag, just direct manipulation of relativistic quantities.
Built for the Classroom
Clean, exportable diagrams and step-by-step framing make it easy for educators to demonstrate concepts and for students to build intuition.
Precision Calculations
Lorentz factors, proper time, length contraction, and velocity addition are computed with research-grade numerical care.
Try It Now
Tilt a worldline. Watch time bend.
Drag the velocity slider to boost a traveling twin toward the speed of light and watch their light cone, worldline, and proper time diverge from the stationary observer's.
1.25×
Time dilation
8.00 yr
Traveler's proper time
10.00 yr
Earth-frame elapsed time
Scenario: a 10 light-year round trip as measured by a stationary observer. Adjust velocity to see how the traveling twin ages more slowly — the essence of the twin paradox, computed live and locally.
About Us
Made by people who think in light cones.
🌌 We're a small team of physicists, simulation engineers, and science educators who got tired of chalkboard diagrams that couldn't move, rotate, or answer "what if." Chrono Paradoxer started as an internal tool for explaining special relativity and grew into a full spacetime sandbox we now share with the community.
🎯 Our mission is simple: intuition about spacetime shouldn't require years of tensor calculus before it clicks. We build tools that let you see relativity happen — light cones tilting, clocks desynchronizing, causality reshaping itself — the moment you move a slider.
🧭 For physics students, Chrono Paradoxer turns abstract Lorentz transformations into diagrams you can drag. For educators, it's a live demonstration instrument. For researchers, it's a fast scratchpad for testing relativistic scenarios and causality structures before committing them to paper.
⚡ Chrono Paradoxer — where causality meets curiosity, one worldline at a time.
Privacy Policy
Your data never leaves your device. Full stop.
Effective Date: January 15, 2026
Chrono Paradoxer was designed from the ground up as a local-first computational tool. Every simulation, diagram, and calculation you run happens directly on your device. This policy explains, in plain terms, what that means for you.
1 Information We Collect
We collect nothing. Chrono Paradoxer does not request, gather, or store any personal information, usage statistics, device identifiers, or diagnostic data. There is no sign-up, no login, and no profile to fill in — the app simply runs its simulations and gets out of your way.
2 How We Use Information
Because no information is collected, none is used, analyzed, aggregated, or sold. There are no behavioral analytics feeding back to us, no usage patterns being studied, and no data pipelines of any kind running behind the scenes.
3 Data Storage
Your saved diagrams, custom paradox scenarios, and calculation settings are stored exclusively in local storage on your own device. Nothing is synchronized to a cloud service, uploaded to a server, or backed up to any account we control — because we don't operate one.
4 Third-Party Services
Chrono Paradoxer contains no third-party analytics kits, advertising networks, crash-reporting trackers, or embedded scripts that could transmit information off your device. The simulator you interact with is the entire application — nothing more is running underneath it.
5 Data Security
Since no personal or simulation data is ever transmitted over a network, there is no transmission to intercept and no remote database to breach. Standard device-level protections (screen lock, disk encryption) offered by your operating system are the only safeguards relevant to locally stored files.
6 Children's Privacy
Chrono Paradoxer does not knowingly or unknowingly collect information from anyone, regardless of age. Because the app gathers no data whatsoever from any user, it is inherently safe for students of any age exploring relativity for a classroom project or personal curiosity.
7 Your Control
There are no accounts to manage and no cloud data to request deletion of. If you wish to remove everything associated with the app, simply uninstalling it removes all locally stored diagrams, scenarios, and preferences from your device.
8 Changes to This Policy
Should our data practices ever change, we will revise this policy and update the effective date above. Continued use of Chrono Paradoxer after such changes take effect constitutes acceptance of the revised terms.
9 Contact
Questions about this policy can be sent to privacy@chronoparadoxerapp.com.
Contact Us
Questions, bugs, or a wild paradox idea?
🛰️ We read everything ourselves — no ticket bots, no runaround. Tell us what's on your mind and we'll get back to you.
⏳ We typically reply within 24–48 hours — no faster-than-light communication yet, we're working on it.