# Construction Calculator A1 Pro vs EMS

The clearest difference is price: EMS at Free against Construction Calculator A1 Pro's $39.99. EMS also leads on iOS requirement (13.0 vs 15.0). Construction Calculator A1 Pro's advantage is device support (4 vs 2). On update cadence, ads and in-app purchases there is nothing between them.

EMS is free to download; Construction Calculator A1 Pro costs $39.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Construction Calculator A1 Pro ships an update monthly, EMS every 3 weeks. The most recent releases landed on October 15, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Construction Calculator A1 Pro | EMS |
| --- | --- | --- |
| Price | $39.99 | **Free** |
| Rating | **[4.1 (8 ratings)](https://appshunter.io/ios/app/construction-calculator-a1-pro/id1587368490/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 76.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 126 MB | 21 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Binary And Bricks Pvt Ltd](https://appshunter.io/developer/1587170688) | [KLANTECH BUSINESS SOLUTIONS PRIVATE LIMITED](https://appshunter.io/developer/1595071894) |

## What reviewers say

### Construction Calculator A1 Pro

[App page](https://appshunter.io/ios/app/construction-calculator-a1-pro/id1587368490)

This app provides specialized calculators for construction professionals, including concrete, rebar, and area/volume calculations. It helps estimate material quantities, steel tonnage, and perform complex measurements with ease. Users can also generate Bills of Quantities and export reports for clients.

**Highlights:** Concrete quantity estimation, Rebar bending schedule (BBS), Feet-inches calculator, Area and volume calculations, Bill of Quantities (BOQ) export, Project organization and sharing

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

**In-app purchases:** none


### EMS

[App page](https://appshunter.io/ios/app/ems-admin/id6499377816)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Construction Calculator A1 Pro free?

Construction Calculator A1 Pro costs $39.99, with no in-app purchases.

### Is EMS free?

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

### Do Construction Calculator A1 Pro or EMS have ads?

Neither Construction Calculator A1 Pro nor EMS shows ads.

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

Construction Calculator A1 Pro ships an update monthly, and EMS every 3 weeks. Most recently, Construction Calculator A1 Pro was updated on October 15, 2026 and EMS on September 30, 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.*