# CPF TechTools vs U

The clearest difference is rating: U at 5.0 against CPF TechTools's 4.3. U also leads on update cadence (monthly vs every 2 months) and iOS requirement (12.4 vs 14.0). CPF TechTools's advantage is ratings volume (23 vs 1). 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.

U holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: CPF TechTools has 23 ratings behind it against 1, so its average is the more settled of the two.

CPF TechTools ships an update every 2 months, U monthly. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | CPF TechTools | U |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (23 ratings)](https://appshunter.io/ios/app/cpf-techtools/id679297384/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/u-plumber/id1583986317/reviews)** |
| Number of ratings | **23** | 1 |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free | Free |
| Size | 8 MB | 45 MB |
| Requires iOS | 14.0 | **12.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| 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/id1583986317)

Connect with local plumbing professionals for on-demand services. Request repairs, installations, and maintenance with ease. Get reliable help for all your plumbing needs.

**Highlights:** Connect with plumbers, Request plumbing services, On-demand repairs, Installations and maintenance, Local professional network

**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 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 4.3 out of 5 from 23 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 monthly. Most recently, CPF TechTools was updated on November 6, 2026 and U on November 3, 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.*