Clean, minimal interface designed for fast field use — no clutter, no confusion.
Available on Android · Download free on Google Play →
Your phone becomes a calibrated color reader. No internet. No equipment. Just your STK and a camera.
Designed for agriculture students, farm technicians, and researchers who need accurate chemical data — not guesswork.
### SOIL ANALYSIS REPORT Target Crop: PATOLA Field Area: 1 hectare ------------------------------------------ ### TEST STRIP RESULTS (STK) - Soil pH: 4.2 (Extremely Acidic) - Nitrogen (N): MEDIUM - Phosphorus (P): LOW - Potassium (K): HIGH ------------------------------------------ ### ANALYSIS REQUEST 1. Recommended fertilizer types and NPK ratios. 2. Total nutrients required for the specified area. 3. Optimized application schedule (basal + top-dress). 4. Soil amendment advice if pH is outside ideal range.
All soil analysis features are free — no credits, no subscriptions. Watch a short video to unlock 24-hour ad-free premium access.
Last updated: 2026
STK Soil Analyzer is designed as a field guidance tool for estimating soil pH and NPK nutrient levels using colorimetric test kits. Results are approximations and should not replace certified laboratory soil testing for critical agricultural decisions.
Color-based readings depend on consistent lighting, test kit quality, and proper technique. The developer does not guarantee accuracy of results.
The developer (Harold Rita) is not liable for any agricultural losses, decisions, or damages arising from the use or misuse of this application.
Your soil sample data, test results, and field records are stored exclusively on your device and belong to you. The developer has no access to your sample data. An anonymous device identifier is sent to our server solely to secure calibration data sync — it contains no personal information and cannot be used to identify you.
These terms may be updated with new app versions. Continued use constitutes acceptance of updated terms.
Last updated: May 17 2026 · Your privacy is important to us.
STK Soil Analyzer does not collect your name, email address, or phone number. No account or sign-up is required to use the app.
The app requests access to your device location for two purposes:
Location access is requested only when needed for these features. You may deny the permission — core soil analysis functions remain fully available without it.
All soil samples, test results, and field records you create are stored exclusively on your device. This data is never uploaded to any server and the developer has no access to it.
Core features (capture, analysis, reports) work fully offline. An internet connection is used in the following cases:
To secure calibration sync, the app sends a hardware-generated anonymous device identifier to our server on first install. This identifier contains no personal information and cannot be used to identify you. Our server stores it alongside a randomly generated security token for the sole purpose of authenticating calibration data requests. It is never shared with third parties.
Camera access is used solely to capture photos for on-device color analysis. Photos are processed locally and are never uploaded or stored beyond the immediate analysis session.
The optional AI recommendation feature generates a structured text prompt that you copy and paste into an external AI model (e.g. Claude, ChatGPT) of your choice. No soil data is sent to these services by this app — usage is entirely at your discretion and governed by each service's own privacy policy.
The anonymous device identifier stored on our server is retained for as long as you use the app to allow calibration sync. Uninstalling the app does not automatically remove it from the server, but it contains no personal information and cannot be linked back to you.
For privacy concerns or to request deletion of your device record from our server, contact the developer at github.com/phpthinky or via the in-app feedback button.
Free to download. Core features work offline. No account required.
Download on Google Play
