# iSolveModel vs Simplex Optima

The clearest difference is price: Simplex Optima at $2.99 against iSolveModel's $9.99. Simplex Optima also leads on update cadence (every 5 days vs every 4 months) and iOS requirement (13.3 vs 17.1). On ads, in-app purchases and device support there is nothing between them.

iSolveModel costs $9.99 and Simplex Optima $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iSolveModel ships an update every 4 months, Simplex Optima every 5 days. The most recent releases landed on September 12, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | iSolveModel | Simplex Optima |
| --- | --- | --- |
| Price | $9.99 | **$2.99** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/isolvemodel/id387627473/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 days** |
| Monetization | Paid | — |
| Size | 5 MB | 2 MB |
| Requires iOS | 17.1 | **13.3** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MINDTech](https://appshunter.io/developer/382887010) | [Konstantinos Ladiellis](https://appshunter.io/developer/1516103440) |

## What reviewers say

### iSolveModel

[App page](https://appshunter.io/ios/app/isolvemodel/id387627473)

This app offers a powerful linear programming solver for iOS devices, utilizing the simplex algorithm and an integrated MIP solver for integer variables. It's designed for students and professionals in operations research and related fields, allowing easy model creation and sharing.

**Highlights:** Linear programming solver, Simplex algorithm, Integrated MIP solver, Sensitivity analysis, iTunes File Sharing, Email model/solution transfer, Text-based model documents

**Features:** macOS Compatibility

**In-app purchases:** none


### Simplex Optima

[App page](https://appshunter.io/ios/app/simplex-optima/id1667878232)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is iSolveModel free?

iSolveModel costs $9.99, with no in-app purchases.

### Is Simplex Optima free?

Simplex Optima costs $2.99, with no in-app purchases.

### Do iSolveModel or Simplex Optima have ads?

Neither iSolveModel nor Simplex Optima shows ads.

### Which is updated more often, iSolveModel or Simplex Optima?

iSolveModel ships an update every 4 months, and Simplex Optima every 5 days. Most recently, iSolveModel was updated on September 12, 2026 and Simplex Optima on September 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*