# PJFFfree vs Quel

The clearest difference is in-app purchases: PJFFfree at none against Quel's 3. Quel's advantage is ads (none vs shown) and update cadence (every 5 days vs every 5 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Quel sells 3 in-app purchases, starting at $9.99 per month. PJFFfree asks for nothing beyond the download.

PJFFfree ships an update every 5 weeks, Quel every 5 days. The most recent releases landed on October 8, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | PJFFfree | Quel |
| --- | --- | --- |
| Price | Free | Free |
| 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** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 5 days** |
| Monetization | Ad-supported | — |
| Size | 7 MB | 7 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [sigeyosi kanenishi](https://appshunter.io/developer/629958778) | [Guillermo Alvarado](https://appshunter.io/developer/1841024589) |

## 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


### Quel

[App page](https://appshunter.io/ios/app/quel/id6752804071)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quel Monthly Plan | $9.99 | per month |
| Quel Yearly Plan | $69.99 | per year |
| Full Access | $4.99 | one-time |


## Frequently asked questions

### Is PJFFfree free?

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

### Is Quel free?

Quel is free to download, with in-app purchases available.

### Do PJFFfree or Quel have ads?

PJFFfree shows ads; Quel does not.

### Which is updated more often, PJFFfree or Quel?

PJFFfree ships an update every 5 weeks, and Quel every 5 days. Most recently, PJFFfree was updated on October 8, 2026 and Quel on October 11, 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.*