Gradalith: Soil Lab

About Gradalith: Soil Lab

Gradalith: Soil Lab is a geotechnical field companion for plotting grain-size distributions, calculating gradation coefficients, and organizing repeatable soil-classification work.

KEY FEATURES
- Sieve and hydrometer gradation workspace
- Semi-log D10, D30, and D60 interpolation
- Uniformity and curvature coefficients
- Atterberg limits and plasticity cues
- Transparent USCS decision support
- Editable sample records plus CSV import
- Scenario comparison and plotted curve
- Local PDF analysis packet
- Forty original offline soil-lab reference plates

ONE-TIME AND PRIVATE
- One paid download; no subscription or in-app purchase
- No account, advertising, analytics, tracking, or developer-operated backend
- Core tools and bundled reference material work offline
- Work remains on device unless you deliberately import, share, or export through an Apple system interface

Classifications are field and study aids, not a stamped geotechnical opinion. Follow project specifications, laboratory procedures, and qualified engineering review.