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Step vs PhET Interactive Simulations: catalog facts
StepPhET Interactive Simulations
Free

Free KDE application.

Free

Free interactive simulations.

Linux Web
  • Edit properties during a running simulation
  • Unit conversion and expression input
  • Simulations can be used immediately with no signup or installation
  • Covers a broad range of physics, chemistry and math topics in one place
  • Two-dimensional simulation only
  • Collision detection is discrete only
  • Aimed at simulation-based exploration rather than structured, graded coursework
  • Browser-based delivery, with no offline access described
Downloadable app Web application
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

Checked September 24, 2026

Checked September 22, 2026

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