Volume equations, log rules, species reference, cruising formulas, and full timber cruising with reports — all in one app that works completely offline.
Your field library
Your Field Library
Every reference tool a forester carries — volume tables, log rules, species codes, formulas, unit conversions — in one app that works offline.
Interactive Scribner, International ¼", and Doyle lookup tables. Enter DBH and log count, get board feet instantly.
BAF, TPA expansion, SDI, QMD, volume per acre, plot spacing — every formula you need with clear explanations.
80+ timber species with codes, identification notes, and cruising guidance for western and southern US regions.
Chains to feet, acres to hectares, MBF to cords, slope % to degrees — with the formula shown for every conversion.
Height-to-diameter ratio calculator with species-specific wind stability ratings. Essential for leave tree selection.
Normal yield tables, site index curves, and CMAI calculations for key western and southern species.
Full Timber Cruising
From quick recon to production cruises. Collect data, calculate volumes, and generate reports — all before you leave the unit.
Variable radius (point sampling), fixed radius plots, tree-based tally, and 100% measure. Quick BA cruises for fast reconnaissance.
Wensel & Olsen equations for western conifers. Clark stem profile model for 49 southern species. Publication-grade accuracy — not generic table lookups.
Stand tables, stock tables, statistical summaries, and sampling error analysis. Generate production cruise designs from recon data. Export to CSV and XLSX.
Add submerchantable and biomass plots at the same plot center. Biomass data tracked separately from sawtimber volumes.
Every calculation runs on-device. No cell signal, no WiFi, no problem. Designed for one-handed use with gloved hands.
Run a recon cruise, check your variability, then generate a production cruise design with the right number of plots — all from the same app.
Volume Equations
Published, peer-reviewed volume equations used across federal, state, and private sector forestry. The same models used by professional foresters nationwide.
Scribner, Doyle, and International ¼" log rules supported
Free download. No account required. No ads. Just the field tools you actually use — built by a forester.