# Flat Pattern Bend Calculator vs Pipe Flow Gas Pressure Drop

The clearest difference is ads: Pipe Flow Gas Pressure Drop at none against Flat Pattern Bend Calculator's shown. Pipe Flow Gas Pressure Drop also leads on monetization model (free vs free with in-app purchases) and update cadence (fortnightly vs every 2 months). Flat Pattern Bend Calculator's advantage is ratings volume (151 vs 13). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Flat Pattern Bend Calculator sells 6 in-app purchases, starting at $4.99 per 7 days and Pipe Flow Gas Pressure Drop sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Pipe Flow Gas Pressure Drop holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Flat Pattern Bend Calculator has 151 ratings behind it against 13, so its average is the more settled of the two.

Flat Pattern Bend Calculator ships an update every 2 months, Pipe Flow Gas Pressure Drop fortnightly. The most recent releases landed on September 24, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | Flat Pattern Bend Calculator | Pipe Flow Gas Pressure Drop |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (151 ratings)](https://appshunter.io/ios/app/flat-pattern-bend-calculator/id1361485922/reviews) | **[4.8 (13 ratings)](https://appshunter.io/ios/app/pipe-flow-gas-pressure-drop/id1582666236/reviews)** |
| Number of ratings | **151** | 13 |
| Positive reviews | 45.2% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 61 MB | 67 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) | [Pipe Flow Software](https://appshunter.io/developer/1193064957) |

## What reviewers say

### Flat Pattern Bend Calculator

[App page](https://appshunter.io/ios/app/flat-pattern-bend-calculator/id1361485922)

This app provides accurate flat pattern layouts for complex sheet metal shapes and transitions. It simplifies calculations for cones, frustums, cylinders, and various transition pieces, saving time and reducing errors in fabrication projects.

**Highlights:** Cone calculations, Frustum calculations, Truncated cylinder layouts, Bend allowance calculations, Transition piece generation, Complex shape patterns

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| MONTHLY UNLOCK | $6.99 | per month |
| Offer : Yearly Access | $29.99 | per year |
| Yearly Access | $39.99 | per year |
| YEARLY UNLOCK | $39.99 | per year |
| LIFETIME UNLOCK | $69.99 | one-time |


### Pipe Flow Gas Pressure Drop

[App page](https://appshunter.io/ios/app/pipe-flow-gas-pressure-drop/id1582666236)

This app calculates gas pressure loss in pipes using various compressible flow equations. It automatically handles gas density changes and provides detailed results including Reynolds number and friction factors. Users can customize pipe materials, fittings, and gases from integrated or custom databases.

**Highlights:** Friction and fitting loss calculations, Multiple compressible flow equations, Automatic gas density handling, Customizable pipe, fitting, and gas data, Imperial and Metric unit support, Professional Excel and PDF reports, Results verification against published data

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pipe Flow Gas Pressure Drop | $4.99 | one-time |


## Frequently asked questions

### Is Flat Pattern Bend Calculator free?

Flat Pattern Bend Calculator is free to download, with in-app purchases available.

### Is Pipe Flow Gas Pressure Drop free?

Pipe Flow Gas Pressure Drop is free to download, with in-app purchases available.

### Which has better reviews, Flat Pattern Bend Calculator or Pipe Flow Gas Pressure Drop?

Pipe Flow Gas Pressure Drop is rated higher. Flat Pattern Bend Calculator averages 4.6 out of 5 from 151 ratings, while Pipe Flow Gas Pressure Drop averages 4.8 from 13 ratings.

### Do Flat Pattern Bend Calculator or Pipe Flow Gas Pressure Drop have ads?

Flat Pattern Bend Calculator shows ads; Pipe Flow Gas Pressure Drop does not.

### Which is updated more often, Flat Pattern Bend Calculator or Pipe Flow Gas Pressure Drop?

Flat Pattern Bend Calculator ships an update every 2 months, and Pipe Flow Gas Pressure Drop fortnightly. Most recently, Flat Pattern Bend Calculator was updated on September 24, 2026 and Pipe Flow Gas Pressure Drop on September 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.*