Lithify: Geology Field Guide

Rock & Mineral Field Guide

Purpose-Built

Lithify is a serious, offline field guide for rockhounds, geology students, prospectors and hikers. It pairs a genuine identification engine with a richly illustrated reference library of 101 rocks and minerals — all on your device, with no account, no subscription, and no photos leaving your phone.

Core Tools

Rock & Mineral Field Guide
Private on-device workflow
No account or subscription

Private by Design

No account, ads, tracking, third-party analytics, or developer-operated backend. Your work stays on your device unless you deliberately share or export it.

Use It Responsibly

Identification tools are educational field aids. Confirm important identifications with appropriate tests or a qualified geologist.