Simplex vs Or Simplex Step
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Simplex
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Do you spend hours solving algebraic matrices by hand, only to have a single sign error ruin your entire Linear Optimization exercise? Understanding the Simplex Algorithm in Operations Research can be frustrating. Current tools are clunky, confusing, and seem like they're from the 90s. DISCOVER SIMPLEX EDUCATIONAL The high-fidelity academic tool designed exclusively for iOS and iPadOS that transforms complex matrices into a fluid, readable, and intuitive visual experience. Perfect for students of Industrial Engineering, Economics, Business Administration, and optimization professionals. WHAT YOU CAN DO: β’ Dynamic Model Builder: Switch between Maximization (Max Z) and Minimization (Min Z). Enter constraints with operators (β€, β₯, =). β’ Intelligent Engine: Automatic conversion to Standard Form (injecting slack, surplus, and artificial variables). β’ Special Case Detection: Identifies unique, multiple (infinite), unbounded, or infeasible solutions without infinite loops. β’ Local History with SwiftData: Audit your past problems instantly, without re-entering large matrices. CHOOSE HOW TO LEARN: 1. FINAL RESULT MODE (Free): Your executive success card. Visualize the optimal vertex with specific color codes (Green for unique solution, Purple for multiple). 2. STEP-BY-STEP MODE: An interactive learning log that details each iteration and pivot in ultra-readable, single-spaced tables. Access it for free through rewarded ads or unlock it forever. PRO PASS (One-Time Payment - No Subscriptions): Completely remove ads, unlock unlimited offline Step-by-Step Guides, and export your completed exercises as LaTeX code or professional PDFs. Designed following Apple's guidelines to offer you a clean, dark, and fast interface. Pass your course without frustration!
Or Simplex Step
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OR Simplex Step-by-Step is a comprehensive Operations Research solver for students. Built and validated with professors at Kyiv Polytechnic University, it is used by students worldwide. EVERY METHOD YOU NEED - Simplex method: classical, Two-Phase, and Big-M - Integer programming: Branch and Bound - 2D graphical method: feasible region, objective line, and optimum - 3D polytope visualization for 3-variable linear programming: rotate and explore the feasible region - Sensitivity and post-optimal analysis: ranges, shadow prices, and RHS intervals - Transportation problem: North-West Corner, Least-Cost, and Vogel's Approximation (VAM) - MODI / U-V method: optimality test and refinement - Assignment problem: Hungarian algorithm - Job sequencing: 2, 3, and N machines using Johnson's algorithm WHY STUDENTS CHOOSE IT - Step-by-step explanations with every iteration described in plain language - Exact fraction arithmetic to avoid rounding errors - Dedicated math keyboard for fractions, signs, and decimals - Problem history to save, reopen, and edit past problems - 8 languages: English, Spanish, French, Portuguese, Russian, Ukrainian, Arabic, and Persian - No account required
Screenshots
Verdict
The clearest difference is iOS requirement: Or Simplex Step at 15.0 against Simplex's 26.0. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Simplex sells 1 one-off in-app purchase and Or Simplex Step sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | Simplex | Or Simplex Step |
|---|---|---|
| Price | Free | Free |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad, iPod β better |
| Requires iOS | 26.0 | 15.0 β better |
| Further details β not scored | ||
| Size | 5 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Fernando Castillo | Bohdan Bezpartochnyi |
In-app purchases
Simplex
- Simplex Premium$1.99
Or Simplex Step
- OR Commented Pro$2.99





