# Plumbing Theory Prep vs Building Code Inspector 3D Pro

The clearest difference is in-app purchases: Building Code Inspector 3D Pro at none against Plumbing Theory Prep's 3. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Plumbing Theory Prep sells 3 in-app purchases, starting at $4.99 per month. Building Code Inspector 3D Pro asks for nothing beyond the download.

## The numbers

| Metric | Plumbing Theory Prep | Building Code Inspector 3D Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Size | 5 MB | 163 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MD Shahariar Nazim Joy](https://appshunter.io/developer/1893961943) | [Yuhsiu Lai](https://appshunter.io/developer/433114647) |

## What reviewers say

### Plumbing Theory Prep

[App page](https://appshunter.io/ios/app/plumbing-theory-prep/id6793827771)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $4.99 | per month |
| Yearly Premium | $14.99 | per year |
| Lifetime Access | $24.99 | one-time |


### Building Code Inspector 3D Pro

[App page](https://appshunter.io/ios/app/building-code-inspector-3d-pro/id6805654046)

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

**In-app purchases:** none


## Frequently asked questions

### Is Plumbing Theory Prep free?

Plumbing Theory Prep is free to download, with in-app purchases available.

### Is Building Code Inspector 3D Pro free?

Building Code Inspector 3D Pro is free to download, with no in-app purchases.

### Do Plumbing Theory Prep or Building Code Inspector 3D Pro have ads?

Neither Plumbing Theory Prep nor Building Code Inspector 3D Pro shows ads.

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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.*