# Or Simplex Step-by-Step Solver

Android app · by Simplex Developers · Education

Or Simplex Step-by-Step Solver has 89,542 installs (+0.3% in the 30 days to 2026-10-29), rated 4.6 from 916 ratings, \#13,693 of 322,990 in Education.

## Figures

- Installs: 89,542
- Rating: 4.6 · 916 ratings
- Price: Free
- In-app purchases: yes
- 7-day growth in installs: +59 (+0.1%) (+143 over 16.9 days)
- 30-day growth in installs: +306 (+0.3%)
- Rank: #202,905 of 2,973,704 Android listings with an install count (down 10,398 since 2026-11-03)
- Rank: #13,693 of 322,990 in Education

## Is Or Simplex Step-by-Step Solver safe?

StoreTally doesn't rate safety. Here's what the store and our tracking show:

- Listed on Google Play.
- Made by Simplex Developers; developer website listed: simplx.dev.
- On Google Play since 2013-04-20. Last updated 2026-10-12.
- Rated 4.6 from 916 ratings.

## Reviews

- Ratings by stars: 5★ 80% · 4★ 13% · 3★ 4% · 2★ 0% · 1★ 4% (896 ratings)

## 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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Source: https://storetally.com/android/com.simplex  
As of 2026-11-14, from the StoreTally census.