HeightCzech vs ForestIN

HeightCzech is a simple mobile tool for measuring tree height using your smartphone. The application uses the phone camera together with internal motion sensors (gyroscope and accelerometer) to estimate the height of a tree from a known distance. The measurement can be performed directly in the field without the need for additional forestry instruments. The app is designed for foresters, students, researchers and anyone interested in practical forest measurements. Main features: • Measure tree height using the smartphone camera • Simple aiming at the base and top of the tree • Height calculation using phone sensors • Clear and fast interface suitable for field work • Works offline without internet connection HeightCzech demonstrates how modern smartphones can support traditional forestry measurements in a simple and accessible way.

ForestIN is a free app for digitizing forest inventory data collection from your phone: plots, trees, species, and carbon calculation, all in a single workflow, with or without an internet connection. Built together with forest researchers, ForestIN replaces the field notebook and the process of typing handwritten data into a computer afterwards. Record it once, in the field, and get the report instantly. FIELD DATA COLLECTION - Create plots with full metadata: team, timestamps, slope, silvicultural system, stand development stage, canopy cover, and species composition. - Record individual trees: DBH, height, crown base height, first live/dead branch height, straightness, curvature, lean, damage, and vitality. - Define the plot area as circular, rectangular, or polygon-based, or import boundaries from an external file. - Add photographs to plots and trees for complete documentation. ACCURATE GEOREFERENCING - Use your phone's built-in GNSS receiver, or connect an external receiver via Bluetooth for higher accuracy. - Check real-time positioning precision while you work. - View plots and trees on an interactive map. INSTANT REPORTS, NO POST-PROCESSING - Generate inventory and carbon stock reports directly within the app, based on species-specific allometric equations. - Manage your own allometric equations, or your organization's, adapted to each region. - Export as PDF for reports, or as a ZIP archive with structured CSV files and photographs for external analysis. WORKS OFFLINE - All data is stored locally on the device and remains available without coverage. - Once connectivity is restored, ForestIN automatically syncs with the cloud (Supabase), enabling team collaboration and multi-device access. - Import historical records using a standardized CSV template, with automatic detection and skipping of duplicate entries. BUILT FOR REAL FIELDWORK - Sequential forms and predefined selection lists reduce data-entry time and errors. - Automatic validation prevents inconsistent or out-of-range values. - Available in English, Spanish, Portuguese, Italian, Finnish, Catalan and German. - Choose your preferred unit system and decimal separator. PROVEN RESULTS In a comparative study with 14 participants, total recording time with ForestIN was 59.2% lower than with the traditional paper-based method, by completely eliminating the subsequent data transcription step. Ideal for forestry technicians, researchers, forest managers, and students who need reliable, traceable, ready-to-use field data, without depending on third-party platforms or external licenses. ForestIN is free to use, and has been developed and tested across contrasting forest environments, making it adaptable to a wide range of ecological and operational contexts.