Legal and licenses

GradePin Drainage Layout is a Gobling Company product. It is not affiliated with Trimble, Apple or survey equipment manufacturers.

Open-source software

The app uses Flutter, Dart, the Dart crypto package and AndroidX Core. PDF generation and preview use Android’s native PDF APIs. Noto Sans and Noto Sans Mono are included with SIL Open Font License notices. Complete software and font notices are inside Method, privacy & help → Open-source licenses.

Artwork and examples

The original grade-stake app icon was created with AI image generation and inspected at small size. Product screenshots are actual Android Release captures. The optional West swale example uses fictional input values; it is not a measured site or certified design.

Contact maga40@naver.com.