📘 OR Simplex Step-by-Step — the most complete Operations Research solver on Android. Built and validated with professors at Kyiv Polytechnic University used by thousands of students worldwide.

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🧮 EVERY METHOD YOU NEED
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🔢 Simplex Method — classical Two-Phase and Big-M
🎯 Integer programming — Branch & Bound
📈 2D graphical method — feasible region objective line optimum
🧊 NEW: 3D polytope visualization for 3-variable LP — rotate and explore the feasible region
🔍 Sensitivity & Post-Optimal Analysis — ranges shadow prices RHS intervals
🚛 Transportation Problem — North-West Corner Least-Cost Vogel's Approximation (VAM)
🔄 MODI / U-V Method — optimality test and refinement
✅ Assignment Problem — Hungarian Algorithm
⏱️ Job Sequencing — 2 3 and N-machine using Johnson's Algorithm

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⭐ WHY STUDENTS CHOOSE IT
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📝 Step-by-step explanations — every iteration commented in plain language
➗ Exact fraction arithmetic — no rounding errors ever
⌨️ Dedicated math keyboard — built for fractions signs and decimals
📂 Problem history — save reopen and edit past problems
🌍 8 languages — English Español Français Português Русский Українська العربية فارسی
⛔ 100% offline — no account no internet no tracking of your work