| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| macOS | — | Yes |
| Linux | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 0 |
| Spec score · Physics Simulation Software | 8.6 (#12) | 7.4 (#65) |
| Assessment tools | No | No |
| Data export | Yes | Yes |
| Delivery mode | desktop | desktop |
| Free plan | Yes | Yes |
| Intended users | The project describes FDTDX as freely usable for research, development, and commercial work involving photonic nanostructures. | The model documentation describes uses including urban airflow, heat transfer, pollutant dispersion, and urban air-quality studies at building-resolving resolution. |
| Lesson library | No | No |
| Purpose | FDTDX is an open-source Python package for simulating and designing three-dimensional photonic nanostructures with the Finite-Difference Time-Domain method. | uDALES is an open-source large-eddy simulation model for urban microclimate, airflow, heat, moisture, and pollutant transport. |
| Support | The FAQ invites users to open GitHub discussions for unanswered questions and issues for suspected bugs, and says the maintainers regularly check discussions. | The project asks users to report issues or unexpected behavior with the new Python package through the uDALES GitHub issue tracker. |
| 3D visuals | Yes | Yes |