# Metal Calculator A1 Pro vs OConstruction

The clearest difference is in-app purchases: OConstruction at none against Metal Calculator A1 Pro's 4. OConstruction also leads on update cadence (every 4 days vs every 6 months). Metal Calculator A1 Pro's advantage is iOS requirement (15.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Metal Calculator A1 Pro sells 4 in-app purchases, starting at $1.99 per month. OConstruction asks for nothing beyond the download.

Metal Calculator A1 Pro ships an update every 6 months, OConstruction every 4 days. The most recent releases landed on October 25, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Metal Calculator A1 Pro | OConstruction |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/metal-calculator-a1-pro/id1589637862/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 days** |
| Monetization | Free | — |
| Size | 94 MB | 27 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Binary And Bricks Pvt Ltd](https://appshunter.io/developer/1587170688) | [priyabrata gharai](https://appshunter.io/developer/550411121) |

## What reviewers say

### Metal Calculator A1 Pro

[App page](https://appshunter.io/ios/app/metal-calculator-a1-pro/id1589637862)

This app simplifies metal quantity calculations for various projects. It offers tools for calculating quantities, shapes, joints, and performing material tests. Supports both Imperial and Metric systems, with a wide range of metal types and converters.

**Highlights:** Quantity calculations for pipes, bars, sheets, and beams, Shape customization for metal bars, Detailed joint calculations (welded, bolted, riveted), Material testing (fatigue, bend, hardness, impact, tensile), Unit converters (length, volume, density), Support for various metal types and materials, Detailed reporting and user-friendly interface

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Metal Monthly Subscription | $1.99 | per month |
| Metal Yearly Subscription | $12.99 | per year |
| Pro Version | $12.99 | one-time |
| Pro version | $12.99 | one-time |


### OConstruction

[App page](https://appshunter.io/ios/app/oconstruction/id6736514449)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Metal Calculator A1 Pro free?

Metal Calculator A1 Pro is free to download, with in-app purchases available.

### Is OConstruction free?

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

### Do Metal Calculator A1 Pro or OConstruction have ads?

Neither Metal Calculator A1 Pro nor OConstruction shows ads.

### Which is updated more often, Metal Calculator A1 Pro or OConstruction?

Metal Calculator A1 Pro ships an update every 6 months, and OConstruction every 4 days. Most recently, Metal Calculator A1 Pro was updated on October 25, 2026 and OConstruction on October 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*