# HVAC Pipe Sizer Plus vs Orifice Flow

The clearest difference is review sentiment: Orifice Flow at 100% against HVAC Pipe Sizer Plus's 50%. Orifice Flow also leads on price ($3.99 vs $13.99) and rating (4.0 vs 3.0). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

HVAC Pipe Sizer Plus costs $13.99 and Orifice Flow $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Orifice Flow holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 50% of HVAC Pipe Sizer Plus's written reviews are positive against 100% of Orifice Flow's.

HVAC Pipe Sizer Plus ships an update every 15 months, Orifice Flow every 12 months. The most recent releases landed on September 21, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | HVAC Pipe Sizer Plus | Orifice Flow |
| --- | --- | --- |
| Price | $13.99 | **$3.99** |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/hvac-pipe-sizer-plus/id352069594/reviews) | **[4.0 (1 ratings)](https://appshunter.io/ios/app/orifice-flow/id479581349/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 12 months** |
| Monetization | Paid | Paid |
| Size | 27 MB | 1 MB |
| Requires iOS | 15.6 | **14.3** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [Kaup Shenoy Associates](https://appshunter.io/developer/460148822) |

## What reviewers say

### HVAC Pipe Sizer Plus

[App page](https://appshunter.io/ios/app/hvac-pipe-sizer-plus/id352069594)

This utility app combines three specialized pipe sizing tools for HVAC systems: liquid, steam, and gas. It offers flexible input options, unit conversions, and an equipment locator for comprehensive HVAC design.

**Highlights:** Liquid pipe sizing, Steam pipe sizing with steam table calculator, Gas pipe sizing (low and high pressure), HVAC Equipment Locator, Slider controls for input adjustments, English and Metric unit display

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

**In-app purchases:** none


### Orifice Flow

[App page](https://appshunter.io/ios/app/orifice-flow/id479581349)

Calculate fluid flow rates in pipes and conduits using orifice plates. Supports common industrial fluids and custom fluid properties, with adjustable units and orifice types. Ideal for engineers and designers.

**Highlights:** Fluid flow rate computation, Supports 15 common industrial fluids, Custom fluid property input and saving, Multiple orifice plate types, Adjustable units (SI/USCS), Detailed computation model documentation

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

**In-app purchases:** none


## Frequently asked questions

### Is HVAC Pipe Sizer Plus free?

HVAC Pipe Sizer Plus costs $13.99, with no in-app purchases.

### Is Orifice Flow free?

Orifice Flow costs $3.99, with no in-app purchases.

### Which has better reviews, HVAC Pipe Sizer Plus or Orifice Flow?

Orifice Flow is rated higher. HVAC Pipe Sizer Plus averages 3.0 out of 5 from 1 ratings, while Orifice Flow averages 4.0 from 1 ratings.

### Do HVAC Pipe Sizer Plus or Orifice Flow have ads?

Neither HVAC Pipe Sizer Plus nor Orifice Flow shows ads.

### Which is updated more often, HVAC Pipe Sizer Plus or Orifice Flow?

HVAC Pipe Sizer Plus ships an update every 15 months, and Orifice Flow every 12 months. Most recently, HVAC Pipe Sizer Plus was updated on September 21, 2026 and Orifice Flow on September 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*