Open source licences

Updated 31 October 2026

PartLens includes Open CASCADE Technology 7.8.1 under the GNU Lesser General Public License version 2.1 with the OCCT additional exception. Its licence texts and the PartLens modification notice are included in the apps. The iOS Help menu also includes Kotlin/Native and bundled runtime notices.

iOS source and relinking materials

The iOS build links OCCT statically. The matching kit contains the application object files, resources, OCCT source and libraries, build instructions and licence notices. It supports relinking PartLens with a modified, compatible OCCT library for your own use and debugging those modifications. Rebuilt apps require your own Apple signing and cannot retain the original App Store signature.

PartLens 2.38.0 (141) iOS source and relinking kit

Earlier TestFlight build: PartLens 2.38.0 (140) iOS source and relinking kit

The kit includes a SHA-256 manifest and a Python relinking command. Its retained objects must pass a fresh link before packaging. No Apple credentials, provisioning profiles or customer CAD files are included.

Questions

For help locating materials for a particular build, contact blw@saptasati.com. The component licences govern the open source components; they permit the modifications and debugging described above.