# Construction Calculator A1 Pro vs Event Jar

The clearest difference is price: Event Jar at $0.99 against Construction Calculator A1 Pro's $39.99. Construction Calculator A1 Pro's advantage is device support (4 vs 1) and iOS requirement (15.0 vs 26.0). On update cadence, ads and in-app purchases there is nothing between them.

Construction Calculator A1 Pro costs $39.99 and Event Jar $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Construction Calculator A1 Pro ships an update monthly, Event Jar every 3 weeks. Both last shipped on November 7, 2026.

## The numbers

| Metric | Construction Calculator A1 Pro | Event Jar |
| --- | --- | --- |
| Price | $39.99 | **$0.99** |
| 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 | 2 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Binary And Bricks Pvt Ltd](https://appshunter.io/developer/1587170688) | [Fabio Brunengo](https://appshunter.io/developer/1702000404) |

## 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


### Event Jar

[App page](https://appshunter.io/ios/app/event-jar/id6459984864)

**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 Event Jar free?

Event Jar costs $0.99, with no in-app purchases.

### Do Construction Calculator A1 Pro or Event Jar have ads?

Neither Construction Calculator A1 Pro nor Event Jar shows ads.

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

Construction Calculator A1 Pro ships an update monthly, and Event Jar every 3 weeks. Most recently, Construction Calculator A1 Pro was updated on November 7, 2026 and Event Jar on November 7, 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.*