# GB Gas Conversion Calculator vs Gas Engineer Software

The clearest difference is in-app purchases: GB Gas Conversion Calculator at none against Gas Engineer Software's 1. Gas Engineer Software's advantage is update cadence (weekly vs every 8 months) and review sentiment (85% vs 63%). On price, ads and device support there is nothing between them.

Both are free to download. Gas Engineer Software sells 1 one-off in-app purchase. GB Gas Conversion Calculator asks for nothing beyond the download.

GB Gas Conversion Calculator ships an update every 8 months, Gas Engineer Software weekly. The most recent releases landed on October 9, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | GB Gas Conversion Calculator | Gas Engineer Software |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 62.5% of reviews | **84.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 196 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [George A Brown](https://appshunter.io/developer/425897007) | [Software Works for You Ltd](https://appshunter.io/developer/771853288) |

## What reviewers say

### GB Gas Conversion Calculator

[App page](https://appshunter.io/ios/app/gb-gas-conversion-calculator/id454573950)

This app provides quick conversions for various gas measurements, including natural gas and LPG, as well as water volumes and flow rates. It also handles metric to imperial measurements and electrical unit conversions.

**Highlights:** Natural gas conversions (M3/hr, KW, BTUs), LPG conversions (M3/hr, KW, kg), Water volume and flow calculations, Metric to imperial measurement conversion, Electrical unit conversion (watts, ohms, volts, amps)

**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 Conversion Calculator free?

GB Gas Conversion Calculator is free to download, 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 Conversion Calculator or Gas Engineer Software have ads?

Neither GB Gas Conversion Calculator nor Gas Engineer Software shows ads.

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

GB Gas Conversion Calculator ships an update every 8 months, and Gas Engineer Software weekly. Most recently, GB Gas Conversion Calculator was updated on October 9, 2026 and Gas Engineer Software on October 17, 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.*