# Concrete Engineering vs SimplexLP

The clearest difference is rating: SimplexLP at 5.0 against Concrete Engineering's 4.2. SimplexLP also leads on iOS requirement (14.1 vs 18.6). Concrete Engineering's advantage is ratings volume (10 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Concrete Engineering costs $3.99 and SimplexLP $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SimplexLP holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Concrete Engineering has 10 ratings behind it against 1, so its average is the more settled of the two.

Concrete Engineering ships an update every 23 months, SimplexLP every 12 months. The most recent releases landed on July 16, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | Concrete Engineering | SimplexLP |
| --- | --- | --- |
| Price | $3.99 | $3.99 |
| Rating | [4.2 (10 ratings)](https://appshunter.io/ios/app/concrete-engineering/id643608704/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/simplexlp/id1114880223/reviews)** |
| Number of ratings | **10** | 1 |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 23 months | **Every 12 months** |
| Monetization | Paid | Paid |
| Size | 8 MB | 4 MB |
| Requires iOS | 18.6 | **14.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Axel Besser](https://appshunter.io/developer/790706426) |

## What reviewers say

### Concrete Engineering

[App page](https://appshunter.io/ios/app/concrete-engineering/id643608704)

This app provides civil engineers with a comprehensive suite of 56 calculators for concrete design and analysis. It features smart auto-fill pickers, calculation history with PDF export, and direct ACI code references for all calculations.

**Highlights:** 56 concrete and civil engineering calculators, Metric and Imperial unit support, Smart auto-fill pickers, Calculation history with PDF export, ACI 318-19 code references, Detailed formulas included

**Features:** macOS Compatibility

**In-app purchases:** none


### SimplexLP

[App page](https://appshunter.io/ios/app/simplexlp/id1114880223)

This app simplifies linear optimization problems with an objective function and constraints. It offers a graphical representation for problems with two variables, making it an ideal learning tool for students and teachers of the Simplex algorithm.

**Highlights:** Solves maximization and minimization problems, Handles unlimited variables and constraints, Supports ≤, ≥, and = inequalities, Provides graphical representation for 2-variable problems, Outputs calculations in fractions or decimals, Offers accurate calculations with fractions

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Concrete Engineering free?

Concrete Engineering costs $3.99, with no in-app purchases.

### Is SimplexLP free?

SimplexLP costs $3.99, with no in-app purchases.

### Which has better reviews, Concrete Engineering or SimplexLP?

SimplexLP is rated higher. Concrete Engineering averages 4.2 out of 5 from 10 ratings, while SimplexLP averages 5.0 from 1 ratings.

### Do Concrete Engineering or SimplexLP have ads?

Neither Concrete Engineering nor SimplexLP shows ads.

### Which is updated more often, Concrete Engineering or SimplexLP?

Concrete Engineering ships an update every 23 months, and SimplexLP every 12 months. Most recently, Concrete Engineering was updated on July 16, 2026 and SimplexLP on June 5, 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.*