# CPF TechTools vs Zurn

The clearest difference is rating: CPF TechTools at 4.5 against Zurn's 3.0. CPF TechTools also leads on update cadence (every 2 months vs every 28 months) and ratings volume (22 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CPF TechTools holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: CPF TechTools has 22 ratings behind it against 2, so its average is the more settled of the two.

CPF TechTools ships an update every 2 months, Zurn every 28 months. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | CPF TechTools | Zurn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (22 ratings)](https://appshunter.io/ios/app/cpf-techtools/id679297384/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/zurn/id1339824205/reviews) |
| Number of ratings | **22** | 2 |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 28 months |
| Monetization | Free | Free |
| Size | 8 MB | 16 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Charlotte Pipe and Foundry Company](https://appshunter.io/developer/679297387) | [Zurn Holdings, Inc.](https://appshunter.io/developer/1339824204) |

## What reviewers say

### CPF TechTools

[App page](https://appshunter.io/ios/app/cpf-techtools/id679297384)

This app offers essential on-the-go technical calculators for plumbing professionals. It includes tools for expansion/contraction and temperature de-rating, with more features planned for future updates.

**Highlights:** Expansion calculator, Contraction calculator, Temperature de-rating calculator, Tools for plumbing professionals, Future tool additions planned

**Features:** macOS Compatibility

**In-app purchases:** none


### Zurn

[App page](https://appshunter.io/ios/app/zurn/id1339824205)

Access detailed product information, specifications, and helpful resources with this scanning application. It provides quick access to data for various products.

**Highlights:** Product information access, View specifications, How-to resources, Scan product data

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CPF TechTools free?

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

### Is Zurn free?

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

### Which has better reviews, CPF TechTools or Zurn?

CPF TechTools is rated higher. CPF TechTools averages 4.5 out of 5 from 22 ratings, while Zurn averages 3.0 from 2 ratings.

### Do CPF TechTools or Zurn have ads?

Neither CPF TechTools nor Zurn shows ads.

### Which is updated more often, CPF TechTools or Zurn?

CPF TechTools ships an update every 2 months, and Zurn every 28 months. Most recently, CPF TechTools was updated on October 14, 2026 and Zurn on October 9, 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.*