Side by side
OPEM vs The Physics Aviary
Both stand on physics simulation software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APILinuxWeb+1
OPEM provides free fuel-cell modeling through desktop, Python, notebook, and Telegram routes. Its documented inputs and outputs make the available analyses explicit for research workflows.
Visit OPEM Free plan Web
The Physics Aviary offers a broad, free collection of physics learning resources in a browser. Its simulations, assignments, teaching materials, and ad-free presentation make it useful for study and instruction, though users may need direct links when the legacy directory has problems.
Visit The Physics AviaryThe facts
| OPEM | The Physics Aviary | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Linux, Web, Windows | Web |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 1 |
| Maker | Not published | The Physics Aviary |
| Website | ecsim.site | thephysicsaviary.com |
| On physics simulation software | #27 of 89 | #31 of 89 |
OPEM: what it does well
- Eight documented static and dynamic models
- Produces CSV, OPEM, and HTML reports
- Supports Python model imports
- Runs through Binder notebooks
- Available offline under an MIT license
What to know first
- Focused on proton-exchange membrane fuel cells
- Terminal use requires Windows or UNIX environments
- Telegram workflow requires submitting a test vector
The Physics Aviary: what it does well
- Free access to all resources
- Labs cover mechanics, circuits, waves, and optics
- Includes homework problems and study aids
- Provides assessment tools and 3D visuals
- Presented without ads, cookies, trackers, or AI
What to know first
- Legacy lab directory reports database issues
- No free trial is offered
- Some worksheets are still being added
Alternatives to OPEM Alternatives to The Physics Aviary The whole list