# iSolveModel vs SQL

The clearest difference is review sentiment: iSolveModel at 71% against SQL's 0%. iSolveModel also leads on ads (none vs shown). SQL's advantage is price (Free vs $9.99) and update cadence (every 5 weeks vs every 4 months). On in-app purchases and device support there is nothing between them.

SQL 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, SQL every 5 weeks. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | iSolveModel | SQL |
| --- | --- | --- |
| 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** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | Paid | **Ad-supported** |
| Size | 5 MB | 36 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


### SQL

[App page](https://appshunter.io/ios/app/sql-er-diagram/id1625280998)

Design, draw, and share entity relationship diagrams. Generate SQL scripts from your diagrams and learn SQL concepts through a dedicated study section. Automatically saves your work locally.

**Highlights:** Design ER diagrams, Generate SQL scripts, Share diagrams and scripts, Customizable canvas size, Automatic local saving, SQL study page, SQL syntax learning page

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iSolveModel free?

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

### Is SQL free?

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

### Do iSolveModel or SQL have ads?

SQL shows ads; iSolveModel does not.

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

iSolveModel ships an update every 4 months, and SQL every 5 weeks. Most recently, iSolveModel was updated on October 1, 2026 and SQL 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.*