# PJFFfree vs Nozzle Calculator Pro

The clearest difference is price: PJFFfree at Free against Nozzle Calculator Pro's $2.99. PJFFfree also leads on update cadence (every 5 weeks vs every 41 months). Nozzle Calculator Pro's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

PJFFfree is free to download; Nozzle Calculator Pro costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PJFFfree ships an update every 5 weeks, Nozzle Calculator Pro every 41 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | PJFFfree | Nozzle Calculator Pro |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pjfffree/id629958775/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 5 weeks** | Every 41 months |
| Monetization | Ad-supported | — |
| Size | 7 MB | 1 MB |
| Requires iOS | **15.0** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [sigeyosi kanenishi](https://appshunter.io/developer/629958778) | [Imran Pinjara](https://appshunter.io/developer/1484488781) |

## What reviewers say

### PJFFfree

[App page](https://appshunter.io/ios/app/pjfffree/id629958775)

This app serves as a manual for piping parts, focusing on Japanese specifications. It lists commonly used items based on manufacturer data and public dimension tables, with all measurements in millimeters.

**Highlights:** Piping parts manual, Japanese specifications, Commonly used parts listing, Manufacturer data integration, Millimeter measurements, JIS standards compliance

**Features:** macOS Compatibility

**In-app purchases:** none


### Nozzle Calculator Pro

[App page](https://appshunter.io/ios/app/nozzle-calculator-pro/id1487358239)

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

**In-app purchases:** none


## Frequently asked questions

### Is PJFFfree free?

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

### Is Nozzle Calculator Pro free?

Nozzle Calculator Pro costs $2.99, with no in-app purchases.

### Do PJFFfree or Nozzle Calculator Pro have ads?

PJFFfree shows ads; Nozzle Calculator Pro does not.

### Which is updated more often, PJFFfree or Nozzle Calculator Pro?

PJFFfree ships an update every 5 weeks, and Nozzle Calculator Pro every 41 months. Most recently, PJFFfree was updated on November 1, 2026 and Nozzle Calculator Pro 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.*