# PVF Reference vs Flange Bolt Size & Torque

The clearest difference is in-app purchases: PVF Reference at none against Flange Bolt Size & Torque's 2. PVF Reference also leads on rating (5.0 vs 4.6) and iOS requirement (8.0 vs 15.1). Flange Bolt Size & Torque's advantage is ratings volume (363 vs 2). On price, ads and device support there is nothing between them.

Both are free to download. Flange Bolt Size & Torque sells 2 in-app purchases, starting at $4.99 per 3 months. PVF Reference asks for nothing beyond the download.

PVF Reference holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Flange Bolt Size & Torque has 363 ratings behind it against 2, so its average is the more settled of the two.

## The numbers

| Metric | PVF Reference | Flange Bolt Size & Torque |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pvf-reference/id1244206014/reviews)** | [4.6 (363 ratings)](https://appshunter.io/ios/app/flange-bolt-size-and-torque/id1489122965/reviews) |
| Number of ratings | 2 | **363** |
| Positive reviews | — | 63.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Monthly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 47 MB | 31 MB |
| Requires iOS | **8.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DistributionNOW](https://appshunter.io/developer/1227921553) | [Open Source Consulting LLC](https://appshunter.io/developer/1222335487) |

## 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


### Flange Bolt Size & Torque

[App page](https://appshunter.io/ios/app/flange-bolt-size-and-torque/id1489122965)

Instantly access flange, pipe, and bolt data offline. Quickly find bolt sizes, torque patterns, flange dimensions, and pipe specifications. Ideal for pipefitters and steamfitters needing rapid access to piping information.

**Highlights:** Offline data access, Instant data lookups, Flange bolting data, Flange dimensions data, Pipe data, Gasket data, Torque pattern images

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flange Bolt Professional | $4.99 | per 3 months |
| Suggested Torque | $0.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Huge time saver
- ✅ Reliable data
- 🛠️ Very helpful tool
- 💡 Useful for trade/craft

**What reviewers complain about**

- 💸 Now charges for features
- 👎 Used to be better
- 📉 Functionality decreased after redesign
- ❌ Missing Code 61/62 flange info
- 💰 Subscription model disliked

**Reported bugs**

- App stopped working, requires resubscription
- App will not open after latest update
- App is broken
- Black screen and grey bar in the middle
- Wrench sizes don't match up on some flanges

**Requested features**

- Add Code 61/62 flange information
- Include machined bolt sizes
- Add torquing equipment info (rad guns, J gun, etc.) and usage instructions
- Include CGI and CG torque specs for different gasket styles
- Add support for larger flange sizes (beyond 60")


## Frequently asked questions

### Is PVF Reference free?

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

### Is Flange Bolt Size & Torque free?

Flange Bolt Size & Torque is free to download, with in-app purchases available.

### Which has better reviews, PVF Reference or Flange Bolt Size & Torque?

PVF Reference is rated higher. PVF Reference averages 5.0 out of 5 from 2 ratings, while Flange Bolt Size & Torque averages 4.6 from 363 ratings.

### Do PVF Reference or Flange Bolt Size & Torque have ads?

Neither PVF Reference nor Flange Bolt Size & Torque 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.*