# Or Simplex Step-by-Step Solver

> Or Simplex Step-by-Step Solver (iPhone/iPad app by Bohdan Bezpartochnyi.)

- Source: https://appshunter.io/ios/app/or-simplex-step-by-step-solver/id6816232479 (this page in markdown: same URL + `.md`)
- Developer: [Bohdan Bezpartochnyi](https://appshunter.io/developer/1850325090)
- Category: Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 45 MB
- Languages: American English
- Released: 2026-10-11
- Data updated: 2026-10-12

## What is Or Simplex Step?

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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| OR Commented Pro | $2.99 | one-time |


## Is Or Simplex Step safe?

Not enough ratings yet to assess Or Simplex Step.

## Is Or Simplex Step legit?

Or Simplex Step-by-Step Solver has limited verification signals. The AppsHunter Legitimacy Score for Or Simplex Step is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 13.3.1 — 2026-10-11

No release notes.

## More apps by Bohdan Bezpartochnyi

- [Skip Spend](https://appshunter.io/ios/app/skip-spend/id6754825556)

All apps by Bohdan Bezpartochnyi: https://appshunter.io/developer/1850325090

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-12.*