Side by side
Physion vs RTMsim
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 Web
Physion provides broad 2D experiment-building tools, scripting, and analysis visuals directly in a browser. Users should account for its online requirement and monthly scene-save limits.
Visit Physion Free plan LinuxWindows
RTMsim combines a focused RTM filling model with GUI and Julia workflows. It is most suitable when you can prepare the required mesh and accept the documented Linux and headless limitations.
Visit RTMsimThe facts
| Physion | RTMsim | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Web | Linux, Windows |
| Lowest paid plan | Basic: $6 a month | Not published |
| Plans published | 3 | None |
| Maker | Not published | Not published |
| Website | physion.net | obertscheiderfhwn.github.io |
| On physics simulation software | #58 of 89 | #54 of 89 |
Physion: what it does well
- Runs in a desktop browser without installation
- Includes varied shapes, joints, springs, and ropes
- Supports liquids, soft bodies, and particles
- Provides JavaScript scripting for object behavior
- Offers live graphs and free-body diagrams
What to know first
- Requires an internet connection
- Mobile drawing and editing are disabled
- Free plan saves one scene per month
- No offline downloadable app mode
RTMsim: what it does well
- Free plan and offline desktop use
- Windows and Linux support
- Interactive inlet selection and result plots
- Supports non-isotropic permeability
- Julia API enables extensions
What to know first
- Mesh generation is not included
- Linux GUI is experimental
- Headless machines are unsupported
- Coarse meshes can cause filling-time error
Alternatives to Physion Alternatives to RTMsim The whole list