# HVAC Pipe Sizer vs Fuse 3d

The clearest difference is price: Fuse 3d at Free against HVAC Pipe Sizer's $6.99. Fuse 3d also leads on in-app purchases (none vs 1) and update cadence (every 2 months vs every 9 months). HVAC Pipe Sizer's advantage is iOS requirement (17.0 vs 26.0). On ads and device support there is nothing between them.

Fuse 3d is free to download; HVAC Pipe Sizer costs $6.99 up front. HVAC Pipe Sizer sells 1 one-off in-app purchase. Fuse 3d asks for nothing beyond the download.

HVAC Pipe Sizer ships an update every 9 months, Fuse 3d every 2 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | HVAC Pipe Sizer | Fuse 3d |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fuse-3d/id6796868071/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 9 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [Toby Naumov](https://appshunter.io/developer/6796868073) |

## What reviewers say

### HVAC Pipe Sizer

[App page](https://appshunter.io/ios/app/hvac-pipe-sizer-steam/id336112747)

Quickly size steam pipe systems by inputting piping and steam properties. Includes a steam table calculator and HVAC equipment locator. Supports English and metric units.

**Highlights:** Steam pipe sizing, Steam table calculator, HVAC Equipment Locator, English/metric unit selection, Pipe fitting database, Slider controls for input

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HVAC Equipment Locator | $9.99 | one-time |


### Fuse 3d

[App page](https://appshunter.io/ios/app/fuse-3d/id6796868071)

This application transforms your iPhone into a powerful 3D scanner. It offers multiple scanning modes, including LiDAR, photogrammetry, and TrueDepth, to capture objects and faces with high precision. Scans can be exported in various formats for use in design, printing, or virtual reality.

**Highlights:** Multiple scanning modes (LiDAR, Photogrammetry, TrueDepth), Real-time mesh reconstruction, High-precision face and object scanning, Export in PLY, OBJ, STL, USDZ formats, On-device processing using ARKit

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

**In-app purchases:** none


## Frequently asked questions

### Is HVAC Pipe Sizer free?

HVAC Pipe Sizer costs $6.99, and also offers in-app purchases.

### Is Fuse 3d free?

Fuse 3d is free to download, with no in-app purchases.

### Do HVAC Pipe Sizer or Fuse 3d have ads?

Neither HVAC Pipe Sizer nor Fuse 3d shows ads.

### Which is updated more often, HVAC Pipe Sizer or Fuse 3d?

HVAC Pipe Sizer ships an update every 9 months, and Fuse 3d every 2 months. Most recently, HVAC Pipe Sizer was updated on October 27, 2026 and Fuse 3d on October 24, 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.*