# Pipe Flow Wizard vs Gastite Sizing App

The clearest difference is review sentiment: Gastite Sizing App at 100% against Pipe Flow Wizard's 50%. Gastite Sizing App also leads on in-app purchases (none vs 3) and update cadence (every 3 weeks vs every 2 months). Pipe Flow Wizard's advantage is iOS requirement (11.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. Pipe Flow Wizard sells 3 in-app purchases, starting at $9.99 per month. Gastite Sizing App asks for nothing beyond the download.

Pipe Flow Wizard ships an update every 2 months, Gastite Sizing App every 3 weeks. The most recent releases landed on September 12, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | Pipe Flow Wizard | Gastite Sizing App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (102 ratings)](https://appshunter.io/ios/app/pipe-flow-wizard-calculator/id1346589732/reviews)** | — |
| Number of ratings | **102** | — |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 73 MB | 15 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pipe Flow Software](https://appshunter.io/developer/1193064957) | [Gastite Systems Limited](https://appshunter.io/developer/1537998855) |

## What reviewers say

### Pipe Flow Wizard

[App page](https://appshunter.io/ios/app/pipe-flow-wizard-calculator/id1346589732)

Calculate fluid flow rate and pressure loss in pipes. This app helps engineers determine pipe diameter, maximum pipe length, and friction loss for both liquid and gas flows, including fittings and elevation changes. Results can be shared as Excel or PDF reports.

**Highlights:** Flow rate calculations, Pressure loss calculations, Pipe diameter sizing, Maximum pipe length calculation, Liquid and gas flow support, Customizable material, fluid, and fitting databases, Imperial and metric unit support, Excel and PDF report generation

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pipe Flow Wizard - 1M | $9.99 | per month |
| Pipe Flow Wizard - 1Y | $19.99 | per year |
| Pipe Flow Wizard - 3M | $20.49 | per 3 months |


### Gastite Sizing App

[App page](https://appshunter.io/ios/app/gastite-sizing-app/id1537998852)

This app simplifies calculating the required size of Gastite® CSST for gas installations. Input gas type, CSST length, and appliance power to instantly determine the correct size. It offers easy navigation, user-friendly design, and access to FAQs and installation guides.

**Highlights:** CSST sizing calculation, Natural gas or LPG selection, Access to FAQs, Downloadable installation guide, User-friendly design, Contact support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pipe Flow Wizard free?

Pipe Flow Wizard is free to download, with in-app purchases available.

### Is Gastite Sizing App free?

Gastite Sizing App is free to download, with no in-app purchases.

### Do Pipe Flow Wizard or Gastite Sizing App have ads?

Neither Pipe Flow Wizard nor Gastite Sizing App shows ads.

### Which is updated more often, Pipe Flow Wizard or Gastite Sizing App?

Pipe Flow Wizard ships an update every 2 months, and Gastite Sizing App every 3 weeks. Most recently, Pipe Flow Wizard was updated on September 12, 2026 and Gastite Sizing App on June 5, 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.*