# Volume in Pipe vs LinkiusHub

The clearest difference is in-app purchases: Volume in Pipe at none against LinkiusHub's 1. LinkiusHub's advantage is update cadence (every 3 months vs every 26 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. LinkiusHub sells 1 one-off in-app purchase. Volume in Pipe asks for nothing beyond the download.

Volume in Pipe ships an update every 26 months, LinkiusHub every 3 months. The most recent releases landed on October 6, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Volume in Pipe | LinkiusHub |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/volume-in-pipe/id1582068096/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 11 MB | 6 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Kelly Gayneaux](https://appshunter.io/developer/1082576429) | [Matthias Gibis](https://appshunter.io/developer/1728325352) |

## 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


### LinkiusHub

[App page](https://appshunter.io/ios/app/linkiushub/id6736413545)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $0.99 | one-time |


## Frequently asked questions

### Is Volume in Pipe free?

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

### Is LinkiusHub free?

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

### Do Volume in Pipe or LinkiusHub have ads?

Neither Volume in Pipe nor LinkiusHub shows ads.

### Which is updated more often, Volume in Pipe or LinkiusHub?

Volume in Pipe ships an update every 26 months, and LinkiusHub every 3 months. Most recently, Volume in Pipe was updated on October 6, 2026 and LinkiusHub on October 25, 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.*