# PVF Reference vs Tube Turns

The clearest difference is rating: PVF Reference at 5.0 against Tube Turns's 4.5. PVF Reference also leads on iOS requirement (8.0 vs 18.6). On price, ratings volume, 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.

PVF Reference holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

## The numbers

| Metric | PVF Reference | Tube Turns |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pvf-reference/id1244206014/reviews)** | [4.5 (4 ratings)](https://appshunter.io/ios/app/tube-turns/id1523547174/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 4 months |
| Monetization | Free | Free |
| Size | 47 MB | 57 MB |
| Requires iOS | **8.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DistributionNOW](https://appshunter.io/developer/1227921553) | [Aaron McCarthy](https://appshunter.io/developer/1523547176) |

## What reviewers say

### PVF Reference

[App page](https://appshunter.io/ios/app/pvf-reference/id1244206014)

Access industry standard terminology, specifications, and reference tables for pipe, valves, fittings, and fasteners. Quickly identify materials, understand markings, and find technical data with interactive tables and diagrams.

**Highlights:** Industry terminology glossary, Material identification diagrams, Technical data tables, Formula conversions, Manufacturing process diagrams, Industry standard marking explanations

**Features:** macOS Compatibility

**In-app purchases:** none


### Tube Turns

[App page](https://appshunter.io/ios/app/tube-turns/id1523547174)

A mobile reference guide for pipe fitting, welding, and industrial piping. It provides instant access to essential formulas, conversion tables, technical specifications, and industry standards for professionals in the oil & gas and petrochemical sectors.

**Highlights:** Technical reference library, Formulas and conversion tools, Welding specifications, Material properties database, Searchable glossary, Offline functionality

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PVF Reference free?

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

### Is Tube Turns free?

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

### Which has better reviews, PVF Reference or Tube Turns?

PVF Reference is rated higher. PVF Reference averages 5.0 out of 5 from 2 ratings, while Tube Turns averages 4.5 from 4 ratings.

### Do PVF Reference or Tube Turns have ads?

Neither PVF Reference nor Tube Turns shows ads.

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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.*