# Construction Calculator A1 vs Skyb

The clearest difference is ads: Skyb at none against Construction Calculator A1's shown. Skyb also leads on iOS requirement (12.4 vs 15.0). Construction Calculator A1's advantage is device support (4 vs 2). On price, update cadence 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.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 10, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Construction Calculator A1 | Skyb |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (23 ratings)](https://appshunter.io/ios/app/construction-calculator-a1/id1589484051/reviews)** | — |
| Number of ratings | **23** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Ad-supported | — |
| Size | 160 MB | 29 MB |
| Requires iOS | 15.0 | **12.4** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Binary And Bricks Pvt Ltd](https://appshunter.io/developer/1587170688) | [AJ FUTURE DEVELOPMENT LLP](https://appshunter.io/developer/1760339932) |

## What reviewers say

### Construction Calculator A1

[App page](https://appshunter.io/ios/app/construction-calculator-a1/id1589484051)

This app provides specialized calculators for construction professionals, including concrete, rebar, and area/volume calculations. It offers material quantity estimation, unit conversion, and professional features like BOQ export and project organization. Designed for contractors, builders, and engineers on job sites worldwide.

**Highlights:** Concrete material quantity calculation, Rebar bending schedule and weight calculation, Feet-inch arithmetic without decimal conversion, Area and volume calculations for 15+ shapes, Construction-specific unit conversions, Bill of Quantities (BOQ) export to PDF/Excel, Save and organize calculations by project

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Skyb

[App page](https://appshunter.io/ios/app/skyb/id6751272192)

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

**In-app purchases:** none


## Frequently asked questions

### Is Construction Calculator A1 free?

Construction Calculator A1 is free to download, with no in-app purchases.

### Is Skyb free?

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

### Do Construction Calculator A1 or Skyb have ads?

Construction Calculator A1 shows ads; Skyb does not.

### Which is updated more often, Construction Calculator A1 or Skyb?

Construction Calculator A1 ships an update every 3 weeks, and Skyb every 3 weeks. Most recently, Construction Calculator A1 was updated on September 10, 2026 and Skyb on September 8, 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.*