# ConstruCalc vs GNR12

The clearest difference is review sentiment: ConstruCalc at 77% against GNR12's 50%. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ConstruCalc ships an update every 5 weeks, GNR12 every 3 weeks. The most recent releases landed on November 13, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | ConstruCalc | GNR12 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (7 ratings)](https://appshunter.io/ios/app/construcalc/id1241654573/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | **76.9% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 43 MB | 58 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Marcus Borges](https://appshunter.io/developer/1241654572) | [Gautica Tecnologia e Inovacao Ltda](https://appshunter.io/developer/721334649) |

## What reviewers say

### ConstruCalc

[App page](https://appshunter.io/ios/app/construcalc/id1241654573)

Accurately estimate building materials and quantities for construction and renovation projects. Avoid waste, improve budgets, and reduce costs by precisely calculating needs for concrete, walls, floors, tiles, and more.

**Highlights:** Material quantity calculation, Concrete estimation, Wall and floor material calculation, Tile and flooring estimation, Staircase and plaster calculation, Paint and PVC material needs, Useful construction tables

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

**In-app purchases:** none


### GNR12

[App page](https://appshunter.io/ios/app/gnr12/id1566643750)

This industrial safety app streamlines data collection from the factory floor. It helps identify and classify hazards using international and Brazilian standards, facilitating risk assessment and safety measure implementation.

**Highlights:** Efficient factory floor data collection, Hazard identification and classification, ISO 12100 risk assessment, HRN, SIL, and PLr integration, NBR 14153 compliance, Detailed safety reports

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ConstruCalc free?

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

### Is GNR12 free?

GNR12 is free to download, with no in-app purchases.

### Do ConstruCalc or GNR12 have ads?

Neither ConstruCalc nor GNR12 shows ads.

### Which is updated more often, ConstruCalc or GNR12?

ConstruCalc ships an update every 5 weeks, and GNR12 every 3 weeks. Most recently, ConstruCalc was updated on November 13, 2026 and GNR12 on November 3, 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.*