Physion

Spec sheet

What it does

Physion is a browser-based 2D physics simulator for designing and running interactive physics experiments.Read 28 Sep 2026 · physion.net

Free plan

YesRead 20 Sep 2026 · physion.net

Paid from

6Read 20 Sep 2026 · physion.net

Support

Users can ask questions or discuss school and classroom needs on Discord, and the Pro plan includes premium support.Read 28 Sep 2026 · physion.net

3D visuals

NoRead 20 Sep 2026 · physion.net

Authentication and billing integrations

Accounts use Google or Facebook sign-in, while paid subscriptions are handled through Stripe inside the app.Read 28 Sep 2026 · physion.net

Authoring tools

YesRead 20 Sep 2026 · physion.net

Boolean and laser tools

The simulator provides boolean operations for combining or cutting shapes and laser rays that reflect off surfaces.Read 28 Sep 2026 · physion.net

Browser and installation

Physion runs in a modern desktop browser with no download, installer, plugin or browser extension, and scenes can be shared by URL.Read 28 Sep 2026 · physion.net

Delivery mode

webRead 20 Sep 2026 · physion.net

Graphs and force diagrams

Physion includes live graphs for motion, force, momentum and energy properties and free-body diagrams showing gravity, normal, friction, joint-reaction and spring forces.Read 28 Sep 2026 · physion.net

JavaScript scripting

Users can attach standard JavaScript Node Scripts to objects, handle lifecycle and collision callbacks, access the physion global and import external JavaScript libraries.Read 28 Sep 2026 · physion.net

Liquid and particle simulation

Physion simulates liquids, soft bodies and particle emitters using particle simulation.Read 28 Sep 2026 · physion.net

Mobile limitation

Phones and tablets can open, watch and interact with existing scenes, but drawing and editing tools are disabled there.Read 28 Sep 2026 · physion.net

Offline access

NoRead 20 Sep 2026 · physion.net

Offline limitation

Physion requires an internet connection, stores saved scenes on its servers and has no offline or downloadable local app mode.Read 28 Sep 2026 · physion.net

Open-source status

The Physion app is not open source, although the physion-assets and physion-translations companion repositories are public and open to contributions.Read 28 Sep 2026 · physion.net

Security and processing

Physics calculations run locally in the user's browser rather than on a server, and Physion says it never sees card details because Stripe handles billing.Read 28 Sep 2026 · physion.net

Shape and mechanism tools

It supports shapes including circles, rectangles, capsules, polygons, text bodies, polylines, spirals and gears, plus joints, springs and ropes.Read 28 Sep 2026 · physion.net

Target users

The maker describes Physion for teachers, students and hobbyists building classroom demonstrations, experiments and mechanical creations.Read 28 Sep 2026 · physion.net

Usage limits

Only account scene saves are metered; building, running and opening scenes are unlimited, with the monthly save count resetting at the start of each calendar month.Read 28 Sep 2026 · physion.net

Plans and prices

Every Physion plan and price →

Where Specifiction places it

• Physics Simulation Software#20 of 898.3