# Pypley vs Pipe Flow Gas Pipe Diameter

The clearest difference is price: Pipe Flow Gas Pipe Diameter at Free against Pypley's $2.99. Pipe Flow Gas Pipe Diameter also leads on rating (4.8 vs 1.0) and ratings volume (5 vs 1). Pypley's advantage is in-app purchases (none vs 1). On update cadence, ads and device support there is nothing between them.

Pipe Flow Gas Pipe Diameter is free to download; Pypley costs $2.99 up front. Pipe Flow Gas Pipe Diameter sells 1 one-off in-app purchase. Pypley asks for nothing beyond the download.

Pipe Flow Gas Pipe Diameter holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: Pipe Flow Gas Pipe Diameter has 5 ratings behind it against 1, so its average is the more settled of the two.

Pypley ships an update every 3 weeks, Pipe Flow Gas Pipe Diameter fortnightly. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Pypley | Pipe Flow Gas Pipe Diameter |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/pypley/id1540444278/reviews) | **[4.8 (5 ratings)](https://appshunter.io/ios/app/pipe-flow-gas-pipe-diameter/id1582795941/reviews)** |
| Number of ratings | 1 | **5** |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Paid | **Free** |
| Size | 4 MB | 67 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ali Mohammed](https://appshunter.io/developer/1540444280) | [Pipe Flow Software](https://appshunter.io/developer/1193064957) |

## What reviewers say

### Pypley

[App page](https://appshunter.io/ios/app/pypley/id1540444278)

This app calculates flow rate, pressure drop, and pump performance for circular pipe systems. It supports custom pumps and fittings, and allows for unit conversions between Metric and US Imperial. Ideal for hydraulic and process engineers for early-stage design and quick estimations.

**Highlights:** Flow rate and pressure drop calculation, Customizable pump and fitting database, Metric/Imperial unit conversion, Pump performance curve plotting, Cavitation risk assessment (NPSH), Reynolds number and friction factor calculation

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

**In-app purchases:** none


### Pipe Flow Gas Pipe Diameter

[App page](https://appshunter.io/ios/app/pipe-flow-gas-pipe-diameter/id1582795941)

This utility app calculates the minimum internal pipe diameter for gas flow based on flow rate and pressure loss. It supports various calculation equations and offers comprehensive results with customizable units and databases for materials, fluids, and fittings.

**Highlights:** Calculates minimum internal pipe diameter, Supports multiple flow equations (AGA, Weymouth, etc.), Handles gas density changes with Ideal Gas Law, Includes databases for gases, pipe materials, and fittings, User-definable custom data, Imperial and Metric unit support, Generates Excel and PDF reports

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pipe Flow Gas Pipe Diameter | $4.99 | one-time |


## Frequently asked questions

### Is Pypley free?

Pypley costs $2.99, with no in-app purchases.

### Is Pipe Flow Gas Pipe Diameter free?

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

### Which has better reviews, Pypley or Pipe Flow Gas Pipe Diameter?

Pipe Flow Gas Pipe Diameter is rated higher. Pypley averages 1.0 out of 5 from 1 ratings, while Pipe Flow Gas Pipe Diameter averages 4.8 from 5 ratings.

### Do Pypley or Pipe Flow Gas Pipe Diameter have ads?

Neither Pypley nor Pipe Flow Gas Pipe Diameter shows ads.

### Which is updated more often, Pypley or Pipe Flow Gas Pipe Diameter?

Pypley ships an update every 3 weeks, and Pipe Flow Gas Pipe Diameter fortnightly. Most recently, Pypley was updated on October 20, 2026 and Pipe Flow Gas Pipe Diameter on October 24, 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.*