# Concrete Engineering vs CSI CARIBE+

The clearest difference is ads: CSI CARIBE+ at none against Concrete Engineering's shown. CSI CARIBE+ also leads on update cadence (monthly vs every 7 months) and iOS requirement (15.0 vs 18.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Concrete Engineering sells 1 one-off in-app purchase and CSI CARIBE+ sells 5 in-app purchases, starting at $9.00 per month. Whichever you choose, the download price is not the number that matters.

Concrete Engineering ships an update every 7 months, CSI CARIBE+ monthly. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Concrete Engineering | CSI CARIBE+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (7 ratings)](https://appshunter.io/ios/app/concrete-engineering-lite/id1132557710/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 8 MB | 63 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [CSI CARIBE LLC](https://appshunter.io/developer/1796182065) |

## What reviewers say

### Concrete Engineering

[App page](https://appshunter.io/ios/app/concrete-engineering-lite/id1132557710)

This app provides a comprehensive suite of calculators for concrete and civil engineering parameters. It features smart auto-fill options, a detailed calculation history with PDF export, and direct references to ACI codes. Unlock all 56 calculators with a one-time purchase.

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

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Concrete Engineering Calc. | $3.99 | one-time |


### CSI CARIBE+

[App page](https://appshunter.io/ios/app/csi-caribe-plus/id6741917208)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mensual | $9.00 | per month |
| Semestral | $72.00 | per 6 months |
| Anual | $99.00 | per year |
| Content Tier $100.00 | $100.00 | one-time |
| Content Tier $200.00 | $200.00 | one-time |


## Frequently asked questions

### Is Concrete Engineering free?

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

### Is CSI CARIBE+ free?

CSI CARIBE+ is free to download, with in-app purchases available.

### Do Concrete Engineering or CSI CARIBE+ have ads?

Concrete Engineering shows ads; CSI CARIBE+ does not.

### Which is updated more often, Concrete Engineering or CSI CARIBE+?

Concrete Engineering ships an update every 7 months, and CSI CARIBE+ monthly. Most recently, Concrete Engineering was updated on October 24, 2026 and CSI CARIBE+ on October 16, 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.*