# Gas Engineer Software vs PAT Testing Log & Cert

The clearest difference is device support: Gas Engineer Software at 3 against PAT Testing Log & Cert's 1. Gas Engineer Software also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Gas Engineer Software sells 1 one-off in-app purchase and PAT Testing Log & Cert sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 13, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Gas Engineer Software | PAT Testing Log & Cert |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 84.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 196 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Software Works for You Ltd](https://appshunter.io/developer/771853288) | [ClearStack Apps](https://appshunter.io/developer/6798305739) |

## What reviewers say

### 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


### PAT Testing Log & Cert

[App page](https://appshunter.io/ios/app/pat-testing-log-and-cert/id6798807631)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PATBook Pro Monthly | $2.99 | per month |
| PATBook Pro Yearly | $29.99 | per year |
| PATBook Pro Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is Gas Engineer Software free?

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

### Is PAT Testing Log & Cert free?

PAT Testing Log & Cert is free to download, with in-app purchases available.

### Do Gas Engineer Software or PAT Testing Log & Cert have ads?

Neither Gas Engineer Software nor PAT Testing Log & Cert shows ads.

### Which is updated more often, Gas Engineer Software or PAT Testing Log & Cert?

Gas Engineer Software ships an update weekly, and PAT Testing Log & Cert weekly. Most recently, Gas Engineer Software was updated on October 13, 2026 and PAT Testing Log & Cert on October 1, 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.*