Gas Engineer Software vs Proxix
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gas Engineer Software
Streamline your heating and plumbing business with a comprehensive job management system. Generate quotes, invoices, and certificates, manage your diary and team, and automate service reminders to grow your revenue. Integrates with popular accounting software and offers offline access.
- Job and diary management
- Quote and invoice generation
- Certificate creation (gas, oil, heat pump)
- Automatic service reminders
- Payment processing integration
- Offline access
- Accounting software sync
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Run your heating & plumbing business in one place and keep the diary full. Gas Engineer Software (GES) is the complete job management system built specifically for UK heating and plumbing businesses. Certificates, jobs, quotes, invoices, payments, on-site tools and automatic service reminders: One app, for every job, on your phone or back at the office. More than 7,000 UK businesses trust GES to run their jobs, backed by 14 years in the market. More than a basic gas certificate app, GES is a full system that runs the business issuing them, then turns this year's certificate into next year's booked work. GROW YOUR BUSINESS • Automatic service reminders keep loyal customers coming back year after year and book the repeat work for you • Businesses on GES see an average 37% revenue increase in their first year • Get paid faster with QR codes and payment links included with your invoices (powered by Crezco), with automatic chasing for late payers LOSE THE PAPERWORK • Quickly generate estimates, quotes, and invoices with templates or an AI draft, complete with statuses and payment tracking • Convert accepted quotes into invoices in one tap • UK gas, oil, and heat pump certificates, signed on-site and sent • Send appointment confirmations to customers in one click • Generate customer statements in seconds • GES saves each person on the team 6.6+ hours a week BUILT FOR HEATING & PLUMBING • The entire GES workflow is designed around heating & plumbing jobs, not bolted onto a generic trades system • Manage your jobs, your diary, and your team in one place. GES works perfectly for sole traders and larger operations that need to connect office staff with engineers • Sync payments, customers, and invoices to Xero, QuickBooks, or Sage • Pull readings from your Anton, Kane or TPI flue gas analyser straight into a certificate • Reference 2,300+ boiler manual PDFs in the app, along with AI Assist to get the answers you need faster • In-app calculators for gas rating, pipe sizing, installation volume, and tightness testing • UK-built, with UK support that actually knows heating via phone, chat, and email • Full offline access on the mobile apps, syncing when next online TRUSTED WITH WHAT MATTERS Your business data, certificates and property records are important, and the engine of your repeat work. GES has 14 years of experience keeping everything safe & adhering to data security best practices. EVERY CERTIFICATE, BUILT IN Gas: Homeowner Gas Safety Record · Landlord Gas Safety Record (CP12) · Gas Warning Notice · Gas Service Record · Gas Breakdown Record · Installation & Commissioning Checklist · Non-Domestic Gas Safety Record · Leisure Industry Gas Safety Record · LPG Gas Safety Record · Non-Domestic Testing & Purging Record · Non-Domestic Catering Record. Oil: CD/10 Installation Completion · CD/11 Servicing & Commissioning · CD/12 Landlord Oil Installation Check · CD/14 Oil Warning & Advice Notice · TI/133D Oil Storage & Tank Risk Report. Other: Air Source Heat Pump Service Record, Legionella Risk Assessment, Minor Electrical Works Record, Unvented Hot Water Cylinder EVERYTHING ELSE IN ONE PLACE Job sheets · quoting & invoicing · job scheduling with calendar · team management and roles · customer database (CRM) · automatic boiler service reminders · email and SMS reminders · web portal syncing · full offline access · gas rating, pipe sizing & installation volume calculators. REQUEST A DEMO If you want to see the app in action or get a better idea of how it works, book a demo with our team. We'll give you a thorough walkthrough & answer any questions. https://gasengineersoftware.co.uk/gas-engineer-software-demo/ QUESTIONS? Contact our customer support team at support@gasengineersoftware.co.uk or 0207 129 7058
Proxix
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Proxix is an all-in-one job management platform that connects customers, professionals, and administrators in one seamless system. Whether someone needs a quick service or wants to offer professional skills, Proxix makes it easy to manage, track, and complete jobs with speed and accuracy. Key Features Two-sided platform Customers can post jobs, and professionals can accept and complete them. Smart job pricing Administrators review job requests and assign fair and transparent prices. Job assignment Administrators can assign the right professional to each task based on skills and availability. Job reports and approvals Professionals submit completion reports, which administrators review and approve. In-app chat system Built-in chat for customers, professionals, and administrators. Supports project-based messaging and direct one-to-one communication. Invoice management Administrators can generate, manage, and share invoices for completed tasks. Efficient workflow The system ensures transparency, accountability, and smooth coordination from job creation to completion. With Proxix, job management becomes simpler, faster, and more organized. Post, assign, approve, chat, and get things done all from one secure and easy-to-use application.
Screenshots
Verdict
The clearest difference is in-app purchases: Proxix at none against Gas Engineer Software's 1. Gas Engineer Software's advantage is update cadence (weekly vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Gas Engineer Software sells 1 one-off in-app purchase. Proxix asks for nothing beyond the download.
Gas Engineer Software ships an update weekly, Proxix fortnightly. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.
| Parameter | Gas Engineer Software | Proxix |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 84.8% of reviews | — |
| Update frequency | Weekly — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 194 MB | 85 MB |
| Age rating | 4+ | 4+ |
| Developer | Software Works for You Ltd | PROXIX ltd |
Bugs and requests
Gas Engineer Software
Reported bugs
5 issues- 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
6 requests- 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
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- Cheaper option for extra engineers
Proxix
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Gas Engineer Software
- Single Engineer - 12 Months Subscription$19.00
Proxix
No in-app purchases
Questions
Is Gas Engineer Software free?
Is Proxix free?
Do Gas Engineer Software or Proxix have ads?
Which is updated more often, Gas Engineer Software or Proxix?
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