ForestIN vs ForestCalc
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
ForestIN
Read full descriptionHide full description
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.
ForestCalc
Read full descriptionHide full description
ForestCalc helps forestry professionals and enthusiasts estimate tree growth (Prirast) and related COβ metrics from a clear, mobile-friendly interface. **Features** β’ Interactive tree gallery with many species and search β’ Dynamic menus based on the selected wood type β’ Tree growth (Prirast) calculator with area, height, age, and related parameters β’ COβ-related results from growth volume β’ UI in 7 languages: English, Bulgarian, German, French, Spanish, Russian, Turkish β’ Works on iPhone and iPad **How it works** 1. Choose a tree species from the gallery. 2. Open the calculation flow and enter stand data. 3. Get instant results from secure online services. **Requirements** Internet connection is required. Calculation data is sent to KDV SoulWorks / GIS Explorer services on geoportal.gisexplorer.eu to perform the math. No user account is required in this version. **Privacy** https://geoportal.gisexplorer.eu/forestcalc/privacy-policy **Support** https://forestcalc.kdvsoulworks.eu Β· support@kdvsoulworks.eu
Screenshots
Verdict
ForestIN and ForestCalc are too close to call on the numbers: across 6 compared parameters β price, update cadence, ads and in-app purchases among them β neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ForestIN ships an update every 6 days, ForestCalc every 4 days. Both last shipped on October 31, 2026.
| Parameter | ForestIN | ForestCalc |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 days | Every 4 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 β better | 14.0 |
| Further details β not scored | ||
| Size | 37 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Carlos Martin-Cortes | KDV SOULWORKS EOOD |
In-app purchases
ForestIN
No in-app purchases
ForestCalc
No in-app purchases





