# GB Gas Pipe Sizing Calculator vs Gas Engineer Software

The clearest difference is review sentiment: Gas Engineer Software at 85% against GB Gas Pipe Sizing Calculator's 38%. Gas Engineer Software also leads on price (Free vs $9.99) and update cadence (weekly vs every 5 months). GB Gas Pipe Sizing Calculator's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

Gas Engineer Software is free to download; GB Gas Pipe Sizing Calculator costs $9.99 up front. Gas Engineer Software sells 1 one-off in-app purchase. GB Gas Pipe Sizing Calculator asks for nothing beyond the download.

GB Gas Pipe Sizing Calculator ships an update every 5 months, Gas Engineer Software weekly. The most recent releases landed on October 26, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | GB Gas Pipe Sizing Calculator | Gas Engineer Software |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Positive reviews | 37.5% of reviews | **84.8% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 194 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [GB-GAS.CO.UK](https://appshunter.io/developer/425897007) | [Software Works for You Ltd](https://appshunter.io/developer/771853288) |

## What reviewers say

### GB Gas Pipe Sizing Calculator

[App page](https://appshunter.io/ios/app/gb-gas-pipe-sizing-calculator/id427457719)

This tool calculates natural gas pipe sizes for metric copper, stainless, and semi-rigid pipes in the UK. Input appliance gas rates, pipe length, and bends to determine if the installation meets the 1mb drop requirement from meter to appliance. It also suggests the appropriate gas meter size.

**Highlights:** Metric pipe sizing, Copper, stainless, and semi-rigid pipe support, Calculates 1mb pressure drop, Suggests gas meter size, Supports up to 30m pipe lengths, Instant results for pipe adjustments

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

**In-app purchases:** none


### Gas Engineer Software

[App page](https://appshunter.io/ios/app/gas-engineer-software-ges/id771853285)

This comprehensive app helps gas, oil, and plumbing professionals streamline their business operations. It allows for the creation of industry-specific certificates, issuance of quotes and invoices, and efficient job scheduling. Manage your team, customers, and finances from any device, anywhere, saving time and boosting revenue.

**Highlights:** Create industry certificates, Issue quotes and invoices, Schedule jobs with calendar, Manage team and customers, Automated service reminders, Offline access

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Single Engineer - 12 Months Subscription | $19.00 | one-time |

**What reviewers like**

- 👍 Easy to use
- ⏱️ Time saver
- 💼 Professional appearance
- 📈 Scales with business growth
- 🛠️ Reliable day-to-day

**What reviewers complain about**

- 💰 Price keeps increasing
- 📉 No real improvement seen
- 😠 Greed perceived
- ⚠️ Unexpected maintenance
- ✍️ Small font size

**Reported bugs**

- Unexpected site shutdowns
- Syncing is slow
- Glitches in invoicing following a job report
- App has become very slow due to latest update
- Not usable at present time

**Requested features**

- Add multiple picture attachments
- Select several photos at once
- Flag jobs as finished
- Oil forms for non-OFTEC registered companies
- Calculate pipe work volume and purge volume


## Frequently asked questions

### Is GB Gas Pipe Sizing Calculator free?

GB Gas Pipe Sizing Calculator costs $9.99, with no in-app purchases.

### Is Gas Engineer Software free?

Gas Engineer Software is free to download, with in-app purchases available.

### Do GB Gas Pipe Sizing Calculator or Gas Engineer Software have ads?

Neither GB Gas Pipe Sizing Calculator nor Gas Engineer Software shows ads.

### Which is updated more often, GB Gas Pipe Sizing Calculator or Gas Engineer Software?

GB Gas Pipe Sizing Calculator ships an update every 5 months, and Gas Engineer Software weekly. Most recently, GB Gas Pipe Sizing Calculator was updated on October 26, 2026 and Gas Engineer Software on October 22, 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.*