# Concrete Engineering vs Simplex Optima

The clearest difference is update cadence: Simplex Optima at every 5 days against Concrete Engineering's every 23 months. Simplex Optima also leads on price ($2.99 vs $3.99) and iOS requirement (13.3 vs 18.6). On ads, in-app purchases and device support there is nothing between them.

Concrete Engineering costs $3.99 and Simplex Optima $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Concrete Engineering ships an update every 23 months, Simplex Optima every 5 days. The most recent releases landed on July 16, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Concrete Engineering | Simplex Optima |
| --- | --- | --- |
| Price | $3.99 | **$2.99** |
| Rating | **[4.2 (10 ratings)](https://appshunter.io/ios/app/concrete-engineering/id643608704/reviews)** | — |
| Number of ratings | **10** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 23 months | **Every 5 days** |
| Monetization | Paid | — |
| Size | 8 MB | 2 MB |
| Requires iOS | 18.6 | **13.3** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Konstantinos Ladiellis](https://appshunter.io/developer/1516103440) |

## 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


### Simplex Optima

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

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Concrete Engineering free?

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

### Is Simplex Optima free?

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

### Do Concrete Engineering or Simplex Optima have ads?

Neither Concrete Engineering nor Simplex Optima shows ads.

### Which is updated more often, Concrete Engineering or Simplex Optima?

Concrete Engineering ships an update every 23 months, and Simplex Optima every 5 days. Most recently, Concrete Engineering was updated on July 16, 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.*