# IAPMO Codes vs Master Plumber Test

The clearest difference is rating: Master Plumber Test at 5.0 against IAPMO Codes's 3.8. Master Plumber Test also leads on update cadence (every 3 weeks vs every 7 months). IAPMO Codes's advantage is in-app purchases (none vs 2) and ratings volume (6 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Master Plumber Test sells 2 in-app purchases, starting at $6.99 per month. IAPMO Codes asks for nothing beyond the download.

Master Plumber Test holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: IAPMO Codes has 6 ratings behind it against 1, so its average is the more settled of the two.

IAPMO Codes ships an update every 7 months, Master Plumber Test every 3 weeks. The most recent releases landed on October 5, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | IAPMO Codes | Master Plumber Test |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (6 ratings)](https://appshunter.io/ios/app/iapmo-codes/id1457481184/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/master-plumber-test/id6664061133/reviews)** |
| Number of ratings | **6** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | **Free** | Subscription |
| Size | 22 MB | 11 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [IAPMO](https://appshunter.io/developer/1455422752) | [Cargo Teleport Inc](https://appshunter.io/developer/1761832181) |

## What reviewers say

### IAPMO Codes

[App page](https://appshunter.io/ios/app/iapmo-codes/id1457481184)

Access and manage your purchased IAPMO codes, including the UPC, UMC, and others. Make annotations, record voice notes, and view content offline. Stay informed with code errata, committee information, and breaking news.

**Highlights:** View purchased IAPMO codes, Offline access, Make annotations, Voice recordings, Access code errata, View development timeline, Direct access to engineering staff

**Features:** macOS Compatibility

**In-app purchases:** none


### Master Plumber Test

[App page](https://appshunter.io/ios/app/master-plumber-test/id6664061133)

Prepare for your plumber licensing exams with a comprehensive study tool. It offers extensive practice questions with detailed explanations, custom test creation, and progress tracking for both UPC and IPC codes. Study offline with a user-friendly interface.

**Highlights:** Extensive practice questions, Customizable practice tests, Detailed explanations and references, Plumbing math and calculations, Progress tracking, Up-to-date content, Offline access

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly subscription | $6.99 | per month |
| Lifetime version | $19.99 | one-time |


## Frequently asked questions

### Is IAPMO Codes free?

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

### Is Master Plumber Test free?

Master Plumber Test is free to download, with in-app purchases available.

### Which has better reviews, IAPMO Codes or Master Plumber Test?

Master Plumber Test is rated higher. IAPMO Codes averages 3.8 out of 5 from 6 ratings, while Master Plumber Test averages 5.0 from 1 ratings.

### Do IAPMO Codes or Master Plumber Test have ads?

Neither IAPMO Codes nor Master Plumber Test shows ads.

### Which is updated more often, IAPMO Codes or Master Plumber Test?

IAPMO Codes ships an update every 7 months, and Master Plumber Test every 3 weeks. Most recently, IAPMO Codes was updated on October 5, 2026 and Master Plumber Test 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.*