OR Solver (Simplex method, Branch-and-Bound, Transportation, Big M)
About Or Simplex Step-by-Step Solver
Or Simplex Step-by-Step Solver is an education app developed by Simplex Developers.
Download Statistics
Or Simplex Step-by-Step Solver has been downloaded 88 thousand times. In the last 30 days, the app was downloaded 500 times.
User Ratings
Or Simplex Step-by-Step Solver is rated 4.59 out of 5 stars. The rating is based on 870 ratings.
App Information
Or Simplex Step-by-Step Solver is FREE to download. The APK download size is 9.05 MB. The latest version available is 13.1.2. The last update was on May 24, 2026.
Technical Requirements
Or Simplex Step-by-Step Solver requires Android 4.0.3+ or higher. The app has a content rating of Everyone. The app has been available on Google Play April 2013.
Description
📘 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.
━━━━━━━━━━━━━━━━━━━━━━━━━ 🧮 EVERY METHOD YOU NEED ━━━━━━━━━━━━━━━━━━━━━━━━━ 🔢 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
━━━━━━━━━━━━━━━━━━━━━━━━━ ⭐ WHY STUDENTS CHOOSE IT ━━━━━━━━━━━━━━━━━━━━━━━━━ 📝 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
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Comments on Or Simplex Step-by-Step Solver for Android
★★★★★A Google User· Apr 9, 2014
Very Awesome !!! This app is unbelievable... I'm using it in all courses of Operational Research that I teach. All of my students really love it.
★★★★★A Google User· Apr 2, 2014
Simple and efficient That's exactly what I needed for operational research and linear programming.
★★★★★Insertx2k Dev· Dec 28, 2025
Better than ChatGPT in solving Simplex Problems, and gives a better detailed step-by-step guide that's helpful in case I missed a step. I Definitely recommend!
★★★★★A Google User· May 14, 2013
Thanks for making it free The way it shows explanation is good, and I never saw a perfect app like this in the market. Please make all possible tools for Operation Research (Transportation and Assignment models, Integer programming Models, Scheduling PERT & COM, Queuing Model).
★☆☆☆☆Sai Kota· Oct 15, 2016
Waste of time, don't install it. Broken language section. It showing again and again🔙🔙🔙🔙
★☆☆☆☆Samuel Gunadi· Aug 31, 2016
Broken—stuck in language selection screen
★☆☆☆☆Manuel Quiroga· Oct 4, 2022
I bought the pro version, and when im going to use the dual option the app keeps stopping :(
★☆☆☆☆D.B Cooper· Jul 2, 2022
The minimum constraints should be one (1)
Google Play Rankings for Or Simplex Step-by-Step Solver
This app is not ranked
Technologies used by Or Simplex Step-by-Step Solver
Or Simplex Step-by-Step Solver is requesting 13 permissions and is using 6 libraries.
Permissions
Development tools
test access to protected storage
Network communication
view network connections,
full network access,
Google Play billing service
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
Android Jetpack core
Apache Commons I/O
Apache Http Auth
Apache HttpMime API
Android In-App Billing Library