# iSolveModel vs Equation

The clearest difference is price: Equation at Free against iSolveModel's $9.99. Equation also leads on update cadence (monthly vs every 4 months) and iOS requirement (15.1 vs 17.1). iSolveModel's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

Equation is free to download; iSolveModel costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iSolveModel ships an update every 4 months, Equation monthly. The most recent releases landed on October 16, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | iSolveModel | Equation |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| 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** | Yes |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Paid | — |
| Size | 5 MB | 34 MB |
| Requires iOS | 17.1 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MINDTech](https://appshunter.io/developer/382887010) | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) |

## 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


### Equation

[App page](https://appshunter.io/ios/app/equation-solver/id1618982230)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iSolveModel free?

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

### Is Equation free?

Equation is free to download, with no in-app purchases.

### Do iSolveModel or Equation have ads?

Equation shows ads; iSolveModel does not.

### Which is updated more often, iSolveModel or Equation?

iSolveModel ships an update every 4 months, and Equation monthly. Most recently, iSolveModel was updated on October 16, 2026 and Equation on October 12, 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.*