FDTDX vs ngspice
| FDTDX | ngspice | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | Linux, self-hosted | Windows, macOS, Linux |
| Free plan | Yes | Yes |
| Delivery mode | desktop | — |
| Lesson library | No | — |
| Authoring tools | Yes | — |
| Assessment tools | No | — |
| 3D visuals | Yes | — |
| Data export | Yes | — |
Both are listed in Best Physics Simulation Software. On Everything Xiaomi, FDTDX scores higher on our published basis.