# Volume in Pipe vs Piping Engineer's Toolbox

The clearest difference is price: Volume in Pipe at Free against Piping Engineer's Toolbox's $4.99. Piping Engineer's Toolbox's advantage is device support (3 vs 1). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

Volume in Pipe is free to download; Piping Engineer's Toolbox costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Volume in Pipe ships an update every 26 months, Piping Engineer's Toolbox every 21 months. The most recent releases landed on October 6, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Volume in Pipe | Piping Engineer's Toolbox |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/volume-in-pipe/id1582068096/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 21 months** |
| Monetization | Free | — |
| Size | 11 MB | 57 MB |
| Requires iOS | 16.6 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kelly Gayneaux](https://appshunter.io/developer/1082576429) | [Ashvin Kevadiya](https://appshunter.io/developer/1756324971) |

## What reviewers say

### Volume in Pipe

[App page](https://appshunter.io/ios/app/volume-in-pipe/id1582068096)

Quickly estimate the gas volume within pipes, launchers, or vessels. Input operating conditions and pipe size for an approximate volume calculation. This tool is designed for rapid field estimates.

**Highlights:** Estimate gas volume, Input operating conditions, Select pipe size, Quick field estimates, Supports iPhone

**Features:** macOS Compatibility

**In-app purchases:** none


### Piping Engineer's Toolbox

[App page](https://appshunter.io/ios/app/piping-engineers-toolbox/id6738736451)

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

**In-app purchases:** none


## Frequently asked questions

### Is Volume in Pipe free?

Volume in Pipe is free to download, with no in-app purchases.

### Is Piping Engineer's Toolbox free?

Piping Engineer's Toolbox costs $4.99, with no in-app purchases.

### Do Volume in Pipe or Piping Engineer's Toolbox have ads?

Neither Volume in Pipe nor Piping Engineer's Toolbox shows ads.

### Which is updated more often, Volume in Pipe or Piping Engineer's Toolbox?

Volume in Pipe ships an update every 26 months, and Piping Engineer's Toolbox every 21 months. Most recently, Volume in Pipe was updated on October 6, 2026 and Piping Engineer's Toolbox on October 13, 2026.

---

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