# CPF TechTools vs AB&I Cast Iron Tools

The clearest difference is update cadence: CPF TechTools at every 2 months against AB&I Cast Iron Tools's every 12 months. AB&I Cast Iron Tools's advantage is iOS requirement (12.0 vs 14.0). On price, ads, in-app purchases and device support 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 ships an update every 2 months, AB&I Cast Iron Tools every 12 months. The most recent releases landed on October 23, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | CPF TechTools | AB&I Cast Iron Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (23 ratings)](https://appshunter.io/ios/app/cpf-techtools/id679297384/reviews)** | — |
| Number of ratings | **23** | — |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 12 months |
| Monetization | Free | — |
| Size | 8 MB | 51 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Charlotte Pipe and Foundry Company](https://appshunter.io/developer/679297387) | [McWane, LLC](https://appshunter.io/developer/882264575) |

## 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


### AB&I Cast Iron Tools

[App page](https://appshunter.io/ios/app/ab-and-i-cast-iron-tools/id1508518401)

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

**In-app purchases:** none


## Frequently asked questions

### Is CPF TechTools free?

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

### Is AB&I Cast Iron Tools free?

AB&I Cast Iron Tools is free to download, with no in-app purchases.

### Do CPF TechTools or AB&I Cast Iron Tools have ads?

Neither CPF TechTools nor AB&I Cast Iron Tools shows ads.

### Which is updated more often, CPF TechTools or AB&I Cast Iron Tools?

CPF TechTools ships an update every 2 months, and AB&I Cast Iron Tools every 12 months. Most recently, CPF TechTools was updated on October 23, 2026 and AB&I Cast Iron Tools on October 13, 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.*