Compare software

Step vs Physics 101: catalog facts
Step	Physics 101
Free Free KDE application.	Freemium A free demo is available, with a registration code for all features.
Linux	Windows, macOS
Edit properties during a running simulation Unit conversion and expression input	Interactive simulations across several physics topics Includes visualizations of motion, forces, and circuits
Two-dimensional simulation only Collision detection is discrete only	The page describes the download as a demo
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.