Terms of use

Effective November 5, 2026. GradePin Drainage Layout is a Gobling Company paid Android utility. Google Play purchase, payment and refund terms apply where available.

Manual planning

The app organizes manually entered station and elevation values and generates informational calculations and sheets. It is not a certified survey, hydrology model, drainage design approval, earthwork volume estimate, code validator or construction certification. No GPS or survey equipment is connected. Confirm datum, units, measurements, physical conditions and applicable site requirements with qualified judgment before work. Matching your entered minimum does not establish drainage performance.

Your work

Use information and files you are entitled to process. Keep independent run backups and exported copies. Private work can be lost through uninstalling, storage failure or clearing app data. Review files before relying on them. Save/share destinations may have separate terms. Do not use the app unlawfully or infringe others’ rights.

Availability and rights

Documented size, storage and numeric limits apply. Compatibility may vary by file and device. To the extent permitted by law, no guarantee is made that every site or imported file can be represented. Nothing limits mandatory consumer rights. Support: maga40@naver.com.