Or Simplex Step-by-Step Solver

📘 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