# Natural Gas Pipe Size vs Engineering Forms

The clearest difference is review sentiment: Engineering Forms at 100% against Natural Gas Pipe Size's 50%. Engineering Forms also leads on price (Free vs $6.99) and update cadence (every 3 months vs every 9 months). On ads, in-app purchases and device support there is nothing between them.

Engineering Forms is free to download; Natural Gas Pipe Size costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Natural Gas Pipe Size ships an update every 9 months, Engineering Forms every 3 months. The most recent releases landed on September 28, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Natural Gas Pipe Size | Engineering Forms |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/natural-gas-pipe-size/id538945071/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 19 MB |
| Requires iOS | 26.0 | **12.4** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Sebastjan Valic](https://appshunter.io/developer/503687385) | [ITECH PROJECTS LTD](https://appshunter.io/developer/1411332906) |

## What reviewers say

### Natural Gas Pipe Size

[App page](https://appshunter.io/ios/app/natural-gas-pipe-size/id538945071)

Quickly calculate natural gas pipe diameters and pressure drops for installations. Supports a wide range of conditions, materials, and units, providing instant and accurate results without subscriptions or ads.

**Highlights:** Instant pipe diameter calculation, Pressure drop estimation, Supports various conditions (heat, pressure, temp), Metric and imperial units, Material and fitting selection, No internet connection required

**Features:** Vision Pro support

**In-app purchases:** none


### Engineering Forms

[App page](https://appshunter.io/ios/app/engineering-forms/id6479765443)

Streamline project management, contract handling, and validation processes for engineers. Generate detailed reports directly from your mobile device and sync seamlessly with a web portal for continued work on your laptop. Customize forms or build your own to suit various engineering trades.

**Highlights:** PPM contract management, Project and validation tracking, In-app report generation, Web portal synchronization, Customizable form builder, User and team management, Secure data sharing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Natural Gas Pipe Size free?

Natural Gas Pipe Size costs $6.99, with no in-app purchases.

### Is Engineering Forms free?

Engineering Forms is free to download, with no in-app purchases.

### Do Natural Gas Pipe Size or Engineering Forms have ads?

Neither Natural Gas Pipe Size nor Engineering Forms shows ads.

### Which is updated more often, Natural Gas Pipe Size or Engineering Forms?

Natural Gas Pipe Size ships an update every 9 months, and Engineering Forms every 3 months. Most recently, Natural Gas Pipe Size was updated on September 28, 2026 and Engineering Forms on October 6, 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.*