# ESC Gas Certificate vs Gas Engineer Software

The clearest difference is in-app purchases: ESC Gas Certificate at none against Gas Engineer Software's 1. ESC Gas Certificate also leads on iOS requirement (11.0 vs 15.0). Gas Engineer Software's advantage is update cadence (weekly vs every 3 months). On price, review sentiment, ads and device support there is nothing between them.

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

ESC Gas Certificate ships an update every 3 months, Gas Engineer Software weekly. The most recent releases landed on October 16, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | ESC Gas Certificate | Gas Engineer Software |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 81.8% of reviews | **84.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 8 MB | 196 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Easy Safety Cert Ltd](https://appshunter.io/developer/594703993) | [Software Works for You Ltd](https://appshunter.io/developer/771853288) |

## What reviewers say

### ESC Gas Certificate

[App page](https://appshunter.io/ios/app/esc-gas-certificate/id596456132)

This app helps gas engineers quickly create and email professional gas safety certificates directly from their iPhone or iPad. It streamlines the process, saving time and money with features like digital signatures and an address book.

**Highlights:** Create gas safety records, Service/Maintenance checklist, Email certificates to clients, Digital signature capture, Address book integration, Personalize certificates, Auto-save certificates

**Features:** macOS Compatibility

**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 ESC Gas Certificate free?

ESC Gas Certificate 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 ESC Gas Certificate or Gas Engineer Software have ads?

Neither ESC Gas Certificate nor Gas Engineer Software shows ads.

### Which is updated more often, ESC Gas Certificate or Gas Engineer Software?

ESC Gas Certificate ships an update every 3 months, and Gas Engineer Software weekly. Most recently, ESC Gas Certificate was updated on October 16, 2026 and Gas Engineer Software on October 13, 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.*