# Gas Engineer App vs BoilerFix AI

The clearest difference is in-app purchases: Gas Engineer App at none against BoilerFix AI's 2. Gas Engineer App also leads on update cadence (every 3 days vs every 3 months). On price, review sentiment, ads and monetization model there is nothing between them.

Both are free to download. BoilerFix AI sells 2 in-app purchases, starting at $3.99 per month. Gas Engineer App asks for nothing beyond the download.

Gas Engineer App ships an update every 3 days, BoilerFix AI every 3 months. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Gas Engineer App | BoilerFix AI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 months |
| Monetization | Subscription | Subscription |
| Size | 63 MB | 7 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [EsoftArena](https://appshunter.io/developer/1882381423) | [Stephen Bird](https://appshunter.io/developer/1896013981) |

## What reviewers say

### Gas Engineer App

[App page](https://appshunter.io/ios/app/gas-engineer-app/id6760107629)

Streamline your gas engineering business with this comprehensive mobile tool. Manage customer and job details, generate professional quotes and invoices, and create essential certificates securely. Reduce paperwork and accelerate payments for a more efficient workflow.

**Highlights:** Customer and job management, Quote and invoice generation, Certificate creation, Secure data storage, Reduced paperwork, Faster payments

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

**In-app purchases:** none


### BoilerFix AI

[App page](https://appshunter.io/ios/app/boilerfix-ai/id6765623181)

A comprehensive mobile toolkit designed for UK Gas Safe registered heating engineers. It consolidates fault code databases, control guides, AI diagnostics, customer management, and administrative tools into a single, offline-capable application.

**Highlights:** Fault Code Database (12 manufacturers), AI Diagnostic Assistant, Boiler Passport (QR-linked service history), Customer Hub & Job Calendar, CP12 Certificates generation, Invoicing & Bookkeeping, Offline functionality

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BoilerFix AI Basic | $3.99 | per month |
| BoilerFix AI Pro | $5.99 | per month |


## Frequently asked questions

### Is Gas Engineer App free?

Gas Engineer App is free to download, with no in-app purchases.

### Is BoilerFix AI free?

BoilerFix AI is free to download, with in-app purchases available.

### Do Gas Engineer App or BoilerFix AI have ads?

Neither Gas Engineer App nor BoilerFix AI shows ads.

### Which is updated more often, Gas Engineer App or BoilerFix AI?

Gas Engineer App ships an update every 3 days, and BoilerFix AI every 3 months. Most recently, Gas Engineer App was updated on October 24, 2026 and BoilerFix AI on October 29, 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.*