# Gas Certificate App vs Firehawk Data Scan

The clearest difference is review sentiment: Gas Certificate App at 61% against Firehawk Data Scan's 3%. Gas Certificate App also leads on update cadence (every 2 weeks vs every 5 weeks). Firehawk Data Scan's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Gas Certificate App sells 2 in-app purchases, starting at $19.00 per month. Firehawk Data Scan asks for nothing beyond the download.

Gas Certificate App ships an update every 2 weeks, Firehawk Data Scan every 5 weeks. The most recent releases landed on September 23, 2026 and June 10, 2026 respectively.

## The numbers

| Metric | Gas Certificate App | Firehawk Data Scan |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **60.7% of reviews** | 3.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 62 MB | 6 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Trade Apps LTD](https://appshunter.io/developer/1293890969) | [Graeme Brennan](https://appshunter.io/developer/1518735429) |

## What reviewers say

### Gas Certificate App

[App page](https://appshunter.io/ios/app/gas-certificate-app/id1293890970)

Streamline your gas engineering business with this app. Generate, store, and send industry-standard digital certificates, invoices, and job records instantly. Work offline, manage your schedule, and keep client data secure with cloud storage and encryption.

**Highlights:** Generate industry-standard gas certificates, Create invoices and estimates, Offline certificate creation and saving, Integrated job scheduling and reminders, Secure cloud storage and data encryption, Branded documentation with company logo

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $19.00 | per month |
| Yearly subscription | $199.99 | per year |


### Firehawk Data Scan

[App page](https://appshunter.io/ios/app/firehawk-data-scan/id1587368417)

Extracts data from specific Firehawk Carbon Monoxide alarms. Supports models CO7B10Y, CO7BD, CO7B10W, and CO10-RF for data retrieval.

**Highlights:** Data extraction, CO alarm monitoring, Firehawk CO7B10Y support, Firehawk CO7BD support, Firehawk CO7B10W support, Firehawk CO10-RF support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Gas Certificate App free?

Gas Certificate App is free to download, with in-app purchases available.

### Is Firehawk Data Scan free?

Firehawk Data Scan is free to download, with no in-app purchases.

### Do Gas Certificate App or Firehawk Data Scan have ads?

Neither Gas Certificate App nor Firehawk Data Scan shows ads.

### Which is updated more often, Gas Certificate App or Firehawk Data Scan?

Gas Certificate App ships an update every 2 weeks, and Firehawk Data Scan every 5 weeks. Most recently, Gas Certificate App was updated on September 23, 2026 and Firehawk Data Scan on June 10, 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.*