Quadratline: Field Ecology

An offline ecological survey notebook: record quadrats and transects, abundance and cover, compute Shannon and Simpson diversity, and export CSV from the field.

Quadratline: Field Ecology is a focused, fully on-device app. Offline ecological survey notebook with custom quadrats and transects, abundance/cover records, Shannon and Simpson diversity, occupancy, rarefaction, GPS notes, and CSV export.

KEY FEATURES

• Custom quadrat and transect records
• Diversity and density metrics
• CSV/PDF field handoff
• Local photos and site coordinates
• Editable sample data and CSV import
• Side-by-side scenario comparison
• Local PDF evidence export
• Fifty-three original offline 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 features and bundled content work offline
• Work remains on device unless you deliberately share or export it through an Apple system interface

Community metrics depend on sampling design and identification quality. Follow the protocol, taxonomy, permits, regional references, and agency or research requirements for the project.