STK Soil Analyzer: pH & NPK

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About this app

STK Soil Analyzer – Smart NPK Tester & Fertilizer Planner

Turn your smartphone into a portable NPK Tester and Soil Analysis laboratory. STK Soil Analyzer combines digital color analysis, AI-powered recommendations, and smart fertilizer planning to help farmers make confident soil management decisions — even offline.

CHOOSE YOUR SCANNING MODE

Quick Scan (Munsell)
Reagent-free soil color estimation using the globally recognized Munsell Soil Color System. Point, scan, and get instant NPK estimates, soil classification, and crop suitability in seconds. Free, no credits required.

Lab Scan (Precision NPK & pH)
Full chemical analysis using STK reagent test kits with CIEDE2000 color matching technology for consistent, accurate readings.
• Nitrogen (N), Phosphorus (P), Potassium (K) analysis
• Soil pH with BCG, BTB, and BCP indicator support
• CIEDE2000 precision color matching — more consistent than visual estimation

KEY FEATURES

🤖 AI Agronomic Recommendations
Powered by Google Gemini. One tap generates crop-specific fertilizer advice, soil amendment plans, and application schedules based on your actual test results.

📅 Fertilizer Application Scheduler
Full 3-stage basal and topdressing fertilizer calculator and schedule with bag quantities per hectare — matched to your soil nutrient levels and chosen crop.

🌤 Weather Advisory
Check real-time weather before fertilizer application. Know instantly whether rain, wind, or temperature make conditions safe to apply — and avoid costly nutrient loss.

📊 Soil Report Cards
Generate and share professional soil analysis reports with NPK status, pH classification, crop suitability, and fertilizer recommendations.

📡 Offline-First Technology
Designed for real agricultural conditions. All scanning, analysis, and fertilizer calculation works fully offline — no mobile data needed in the field.

WHAT STK ANALYZES

• Nitrogen (N) — High / Medium / Low
• Phosphorus (P) — High / Medium / Low
• Potassium (K) — High / Medium / Low
• Soil pH — Acidic to Alkaline range
• Soil Classification & Organic Matter Estimate
• Crop Suitability matched to active crop profiles

IDEAL FOR

Farmers · Agronomists · Agriculture Students
Researchers · Extension Workers · Soil Technicians
Smart Farming Projects · Precision Agriculture

WHY STK?

✔ Dual scan modes — Quick field estimate or full lab analysis
✔ AI-powered crop and fertilizer recommendations
✔ Fertilizer calculator with application timing
✔ Weather advisory for safer fertilizer application
✔ Shareable professional soil report cards
✔ Works fully offline in remote farm areas
✔ Calibration profiles synced from agricultural databases

⚠️ IMPORTANT NOTE

STK Soil Analyzer is a field guidance tool. Results depend on proper sample preparation, lighting conditions, and reagent kit quality. For critical agricultural decisions, laboratory testing is recommended.

🌐 BUILT FOR GLOBAL AGRICULTURE

Developed under TAMAD (Tech-Agri for Mindoro Agile Development) to bring practical, accessible technology to the hands of those who feed the world.

Understand your soil. Plan your fertilizer. Grow better crops.

What’s new

🌱 What's new?
🛠️ Fixed an issue where the 8 supported languages were not changing correctly after the v3 release.