# OConstruction vs Construction Expert A1 PRO

The clearest difference is in-app purchases: OConstruction at none against Construction Expert A1 PRO's 3. OConstruction also leads on update cadence (every 4 days vs fortnightly). Construction Expert 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. Construction Expert A1 PRO sells 3 in-app purchases, starting at $2.99 per month. OConstruction asks for nothing beyond the download.

OConstruction ships an update every 4 days, Construction Expert A1 PRO fortnightly. The most recent releases landed on September 14, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | OConstruction | Construction Expert A1 PRO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/construction-expert-a1-pro/id6757102187/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 27 MB | 72 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [priyabrata gharai](https://appshunter.io/developer/550411121) | [Binary And Bricks Pvt Ltd](https://appshunter.io/developer/1587170688) |

## What reviewers say

### OConstruction

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Construction Expert A1 PRO

[App page](https://appshunter.io/ios/app/construction-expert-a1-pro/id6757102187)

This app is a comprehensive construction calculator designed for professionals. It offers advanced calculations for framing, stair layout, trade-specific needs, and material estimation, replacing the need for expensive hardware calculators.

**Highlights:** Feet-inch-fraction math, Right angle and roof framing, Stair layout calculations, Trade-specific calculators (Electrical, Plumbing, HVAC), Area and volume calculations for 57 shapes, Material estimation tools, Project management and export options

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Construction Expert Monthly Sub | $2.99 | per month |
| Construction Expert Yearly | $14.99 | per year |
| Construction Expert Lifetime Access | $24.99 | one-time |


## Frequently asked questions

### Is OConstruction free?

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

### Is Construction Expert A1 PRO free?

Construction Expert A1 PRO is free to download, with in-app purchases available.

### Do OConstruction or Construction Expert A1 PRO have ads?

Neither OConstruction nor Construction Expert A1 PRO shows ads.

### Which is updated more often, OConstruction or Construction Expert A1 PRO?

OConstruction ships an update every 4 days, and Construction Expert A1 PRO fortnightly. Most recently, OConstruction was updated on September 14, 2026 and Construction Expert A1 PRO 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.*