# HVAC Pipe Sizer vs Slacker Virtual Remote

The clearest difference is price: Slacker Virtual Remote at Free against HVAC Pipe Sizer's $4.99. Slacker Virtual Remote also leads on iOS requirement (12.1 vs 15.6). On rating, review sentiment, ratings volume and update cadence there is nothing between them.

Slacker Virtual Remote is free to download; HVAC Pipe Sizer costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for HVAC Pipe Sizer against 5.0 for Slacker Virtual Remote. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

HVAC Pipe Sizer ships an update every 8 months, Slacker Virtual Remote every 6 months. The most recent releases landed on October 15, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | HVAC Pipe Sizer | Slacker Virtual Remote |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/hvac-pipe-sizer-gas-high/id341828523/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/slacker-virtual-remote/id1518520216/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 6 months** |
| Monetization | Paid | **Free** |
| Size | 17 MB | 27 MB |
| Requires iOS | 15.6 | **12.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [Motool Inc](https://appshunter.io/developer/1444719112) |

## What reviewers say

### HVAC Pipe Sizer

[App page](https://appshunter.io/ios/app/hvac-pipe-sizer-gas-high/id341828523)

This utility app helps engineers quickly size high-pressure gas piping systems. Input flow, pressure, and pipe properties to calculate diameters, velocity, and equivalent length. Supports English and metric units with built-in tables for various pipe materials.

**Highlights:** High-pressure gas pipe sizing, Input flow, pressure, and pipe parameters, Calculate exact/nominal diameters, Determine velocity and equivalent length, Supports English and metric units, Includes pipe fitting tables, Universal app for iPhone and iPad

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

**In-app purchases:** none


### Slacker Virtual Remote

[App page](https://appshunter.io/ios/app/slacker-virtual-remote/id1518520216)

Transform your smartphone into a remote display for a digital suspension tuner. View real-time measurements and control device functions like reset and auto-zero. This version offers core remote capabilities without saving settings.

**Highlights:** Remote display for suspension tuner, Real-time measurement viewing, Control reset function, Control auto-zero function, Bluetooth connectivity

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HVAC Pipe Sizer free?

HVAC Pipe Sizer costs $4.99, with no in-app purchases.

### Is Slacker Virtual Remote free?

Slacker Virtual Remote is free to download, with no in-app purchases.

### Which has better reviews, HVAC Pipe Sizer or Slacker Virtual Remote?

HVAC Pipe Sizer and Slacker Virtual Remote are both rated 5.0 out of 5 on the App Store, from 3 and 2 ratings respectively.

### Do HVAC Pipe Sizer or Slacker Virtual Remote have ads?

Neither HVAC Pipe Sizer nor Slacker Virtual Remote shows ads.

### Which is updated more often, HVAC Pipe Sizer or Slacker Virtual Remote?

HVAC Pipe Sizer ships an update every 8 months, and Slacker Virtual Remote every 6 months. Most recently, HVAC Pipe Sizer was updated on October 15, 2026 and Slacker Virtual Remote on October 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.*