# STRUCT Construction Calculator vs MasterBuilder Pro

The clearest difference is in-app purchases: STRUCT Construction Calculator at none against MasterBuilder Pro's 3. STRUCT Construction Calculator also leads on iOS requirement (13.0 vs 15.1). MasterBuilder Pro's advantage is update cadence (every 2 months vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. MasterBuilder Pro sells 3 in-app purchases, starting at $9.00 per month. STRUCT Construction Calculator asks for nothing beyond the download.

STRUCT Construction Calculator ships an update every 4 months, MasterBuilder Pro every 2 months. The most recent releases landed on September 25, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | STRUCT Construction Calculator | MasterBuilder Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 16 MB | 34 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MOBILEXAPPS MB](https://appshunter.io/developer/1685170475) | [Harrison Habib](https://appshunter.io/developer/1883474674) |

## What reviewers say

### STRUCT Construction Calculator

[App page](https://appshunter.io/ios/app/struct-construction-calculator/id6758335610)

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

**In-app purchases:** none


### MasterBuilder Pro

[App page](https://appshunter.io/ios/app/masterbuilder-pro/id6760252415)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MasterBuilder Pro Monthly | $9.00 | per month |
| Annual | $89.99 | per year |
| Lifetime | $199.99 | one-time |


## Frequently asked questions

### Is STRUCT Construction Calculator free?

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

### Is MasterBuilder Pro free?

MasterBuilder Pro is free to download, with in-app purchases available.

### Do STRUCT Construction Calculator or MasterBuilder Pro have ads?

Neither STRUCT Construction Calculator nor MasterBuilder Pro shows ads.

### Which is updated more often, STRUCT Construction Calculator or MasterBuilder Pro?

STRUCT Construction Calculator ships an update every 4 months, and MasterBuilder Pro every 2 months. Most recently, STRUCT Construction Calculator was updated on September 25, 2026 and MasterBuilder Pro on September 30, 2026.

---

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