| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | — | Yes |
| Linux | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 1 | 0 |
| Spec score · Physics Simulation Software | 8.6 (#12) | 7.1 (#74) |
| Assessment tools | No | Yes |
| Audience | The project presents FDTDX for research, development, and commercial use in photonic nanostructure simulation and design. | The author says he taught high school physics for 27 years and AP Physics for 25 years. |
| Authoring tools | Yes | No |
| Delivery mode | desktop | web |
| Free plan | Yes | Yes |
| Lesson library | No | Yes |
| Support | The FAQ invites users to open GitHub discussions for unanswered questions and issues for suspected bugs, and says the maintainers regularly check discussions. | Tom Walsh invites feedback and suggestions for new simulations by email at [email protected]. |
| 3D visuals | Yes | Yes |