# CPF TechTools vs U

The clearest difference is review sentiment: U at 100% against CPF TechTools's 55%. U also leads on rating (5.0 vs 4.5) and iOS requirement (12.4 vs 14.0). CPF TechTools's advantage is ratings volume (22 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

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

U holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: CPF TechTools has 22 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 55% of CPF TechTools's written reviews are positive against 100% of U's.

CPF TechTools ships an update every 2 months, U every 5 weeks. The most recent releases landed on July 7, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | CPF TechTools | U |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (22 ratings)](https://appshunter.io/ios/app/cpf-techtools/id679297384/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/u-plumber-pro/id1578092414/reviews)** |
| Number of ratings | **22** | 1 |
| Positive reviews | 54.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 8 MB | 45 MB |
| Requires iOS | 14.0 | **12.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Charlotte Pipe and Foundry Company](https://appshunter.io/developer/679297387) | [Uraniumsoft](https://appshunter.io/developer/1578092416) |

## 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


### U

[App page](https://appshunter.io/ios/app/u-plumber-pro/id1578092414)

Connects plumbing service providers with urgent local service requests in real-time. Streamlines the process of finding and accepting jobs efficiently.

**Highlights:** Real-time service requests, Nearby job alerts, Provider-focused, Efficient job matching

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is CPF TechTools free?

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

### Is U free?

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

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

U is rated higher. CPF TechTools averages 4.5 out of 5 from 22 ratings, while U averages 5.0 from 1 ratings.

### Do CPF TechTools or U have ads?

Neither CPF TechTools nor U shows ads.

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

CPF TechTools ships an update every 2 months, and U every 5 weeks. Most recently, CPF TechTools was updated on July 7, 2026 and U on June 4, 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.*