# linear programming vs DuelEng

The clearest difference is in-app purchases: linear programming at none against DuelEng's 2. linear programming also leads on ads (none vs shown). DuelEng's advantage is update cadence (every 8 days vs every 5 months) and iOS requirement (16.6 vs 18.0). On price and device support there is nothing between them.

Both are free to download. DuelEng sells 2 in-app purchases, starting at $3.99 per month. linear programming asks for nothing beyond the download.

linear programming ships an update every 5 months, DuelEng every 8 days. The most recent releases landed on September 29, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | linear programming | DuelEng |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 8 days** |
| Monetization | Free | — |
| Size | 3 MB | 28 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [MEHMET CELIK](https://appshunter.io/developer/1838202252) | [Erdener YAVUZ](https://appshunter.io/developer/1874921189) |

## What reviewers say

### linear programming

[App page](https://appshunter.io/ios/app/linear-programming/id6752208284)

This app helps users set up and solve linear programming problems using the simplex method. It offers step-by-step progress tracking and in-depth analysis of results, suitable for students, researchers, and professionals.

**Highlights:** Simplex method implementation, Step-by-step problem solving, In-depth result analysis, Model optimization, Progress tracking

**Features:** macOS Compatibility

**In-app purchases:** none


### DuelEng

[App page](https://appshunter.io/ios/app/dueleng/id6782185127)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DuelEng Premium Monthly | $3.99 | per month |
| DuelEng Premium Yearly | $39.99 | per year |


## Frequently asked questions

### Is linear programming free?

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

### Is DuelEng free?

DuelEng is free to download, with in-app purchases available.

### Do linear programming or DuelEng have ads?

DuelEng shows ads; linear programming does not.

### Which is updated more often, linear programming or DuelEng?

linear programming ships an update every 5 months, and DuelEng every 8 days. Most recently, linear programming was updated on September 29, 2026 and DuelEng on October 9, 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.*