# NPSH Calculator vs PipeFabAR

The clearest difference is price: PipeFabAR at Free against NPSH Calculator's $1.99. NPSH Calculator's advantage is iOS requirement (15.1 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

PipeFabAR is free to download; NPSH Calculator costs $1.99 up front. NPSH Calculator sells 1 one-off in-app purchase and PipeFabAR sells 1 in-app purchase, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 21, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | NPSH Calculator | PipeFabAR |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pipefabar/id6759136522/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | — | Free with in-app purchases |
| Size | 34 MB | 6 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) | [Mission Integrated Systmes](https://appshunter.io/developer/1877023198) |

## What reviewers say

### NPSH Calculator

[App page](https://appshunter.io/ios/app/npsh-calculator/id6756281499)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NPSH Industrial | $4.99 | one-time |


### PipeFabAR

[App page](https://appshunter.io/ios/app/pipefabar/id6759136522)

Design and generate pipe isometric drawings for fabrication or material quotations. Organize your work into projects, work packages, and spools with a few simple clicks.

**Highlights:** Create pipe isometrics, Organize into projects, Manage work packages, Generate spools for fabrication, Issue for material quotations

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PipeFabAR Pro | $7.99 | per month |


## Frequently asked questions

### Is NPSH Calculator free?

NPSH Calculator costs $1.99, and also offers in-app purchases.

### Is PipeFabAR free?

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

### Do NPSH Calculator or PipeFabAR have ads?

Neither NPSH Calculator nor PipeFabAR shows ads.

### Which is updated more often, NPSH Calculator or PipeFabAR?

NPSH Calculator ships an update every 3 months, and PipeFabAR every 3 months. Most recently, NPSH Calculator was updated on October 21, 2026 and PipeFabAR on October 8, 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.*