SilvaCruise — Professional Timber Cruising & Forest Mensuration
By downloading, installing, or using SilvaCruise, you agree to these Terms of Use. If you do not agree, do not use the app.
SilvaCruise is a mobile application for timber cruising, forest mensuration, and forestry field data collection. It provides tools for basal area estimation, volume calculations, statistical analysis, mapping, and reference materials for professional foresters. SilvaCruise offers an optional account with cloud sync and an optional paid subscription (SilvaCruise Pro).
You may use SilvaCruise as a guest without an account. If you create an account, you are responsible for maintaining the confidentiality of your login credentials and for activity under your account. If you enable cloud sync, the data you choose to sync is stored on our hosting provider's servers as described in our Privacy Policy. You remain responsible for maintaining your own backups; we do not guarantee against data loss.
SilvaCruise is free to download and use. Certain features (including spatial file imports, plot grid generation, full map navigation, XLSX export, and PDF cruise reports) require a paid subscription, SilvaCruise Pro.
SilvaCruise is a field tool designed to assist professional foresters. While the calculations and reference data are based on established forestry methods and published sources (including USFS, WA DNR, and Cal Fire references), all outputs are estimates and approximations — not exact measurements. The app does not replace professional judgment. All timber cruise results, volume estimates, defect assessments, and statistical analyses should be reviewed by a qualified forester before use in official reports, timber sale appraisals, contract administration, or regulatory submissions.
SilvaCruise uses standard forestry formulas, published volume tables, and established mensuration methods. However, all outputs are estimates, not exact measurements. Users should understand the following limitations:
Volume estimates are derived from regionally averaged volume tables and form class assumptions (e.g., Scribner Decimal C, Form Class 78). Actual merchantable volume depends on individual tree form, taper, bucking decisions, mill specifications, and scaling practices. Cruise volume estimates routinely differ from scaled volume at the mill.
Defect and cull estimates are visual approximations guided by general indicators. Actual internal defect can only be determined by cutting the tree. Cull percentages entered by the user are professional judgments, not precise measurements, and deduction standards vary by agency and region.
Growth and yield projections are based on historical yield tables and average site conditions. Actual growth varies by site quality, genetics, climate, disturbance history, and management regime. Projections should be treated as planning-level estimates, not guarantees of future stand conditions.
Statistical estimates (sampling error, confidence intervals, sample size calculations) are based on standard statistical theory and are only as reliable as the underlying sampling design, field measurements, and assumptions of the sampling method.
Reference data including species characteristics, bark factors, slope correction factors, and conversion values are derived from published sources and represent general averages. Local conditions may differ.
No software can guarantee perfect accuracy in all field conditions. Users are responsible for applying professional judgment, verifying results against applicable agency standards, and ensuring outputs are appropriate for their intended use. The developer is not liable for errors in cruise data, volume estimates, or any decisions made based on app outputs.
SilvaCruise and its original content, features, and functionality are owned by the developer. Reference materials incorporated into the app are derived from publicly available government forestry publications and are used for educational and professional reference purposes.
All cruise data you create belongs to you. By default it is stored locally on your device; if you enable cloud sync, the data you choose to sync is stored as described in the Privacy Policy. You are responsible for backing up your own data. Uninstalling the app permanently deletes locally stored cruise data.
SilvaCruise is provided "as is" without warranty of any kind. The developer shall not be liable for any indirect, incidental, special, or consequential damages arising from the use of or inability to use the app, including but not limited to: lost timber sale revenue, incorrect volume estimates, regulatory non-compliance, or data loss.
SilvaCruise is designed for use in remote forest environments. Users are responsible for their own safety in the field. Do not allow app use to distract from hazard awareness, including falling trees, wildlife, terrain hazards, or equipment operation.
We reserve the right to modify these terms at any time. Continued use of the app after changes constitutes acceptance of the updated terms.
These terms shall be governed by the laws of the State of California, United States, without regard to its conflict-of-law provisions.
Questions about these terms can be directed to: silvacruiseapp@gmail.com
Effective date: May 31, 2026