Comparison

Gas Engineer Software vs Commusoft

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

Commusoft

This application helps service businesses streamline operations, manage jobs, and enhance customer interactions. It provides tools for communication, data access, scheduling, form completion, and payment processing, all from a mobile device.

Highlights
  • Real-time syncing of appointments and job updates
  • Centralized customer and job data access
  • Digital custom forms with e-signature capture
  • On-site invoicing and payment processing
  • Quote and estimate generation
  • Parts and asset management with inventory tracking
Read full description

Commusoft is an all-in-one system designed to streamline work, generate more business, and help provide world-class customer journeys. With the Commusoft mobile app, technicians and managers are empowered to efficiently communicate with the office, access work order and customer data, view and update schedules, complete forms and checklists, process invoices and payments - and more. Service businesses from a range of industries can utilize Commusoft, including: • HVAC • Plumbing • Electrical • Fire & Security • Roofing • Plus many others Effortlessly handle day-to-day work with powerful mobile features designed for field service: ‣ REAL-TIME SYNCING New appointments, job updates, and tasks sync in real time, so teams are always on the same page. Plus, technician actions trigger pre-set automations such as communications with customers. ‣ ALL DATA IN ONE PLACE Customer information, job reports, site photos, and asset data are all safely organized and accessible from anywhere. ‣ CUSTOM FORMS Easily complete digital custom forms and utilize auto-filled fields, dropdown questions, and e-signature capture. ‣ INVOICING & PAYMENTS Create invoices direct from the job site and send straight to the customer - or take payment immediately with our SumUp integration. ‣ QUOTES & ESTIMATES Complete professional, multi-option quotes and have customers sign off work immediately or email it to them to review and accept online. ‣ PARTS & ASSET MANAGEMENT Request parts from the office or order directly from a vendor - plus with inventory management, see exactly what you have in stock in your truck. ‣ SMARTPHONE & TABLET The Commusoft mobile app is available on both smartphones and tablet, depending on which you prefer. Please note, an active Commusoft account and login is required in order to use this app - learn more at www.commusoft.us.

Screenshots

Gas Engineer Software4 screens
Commusoft4 screens

Verdict

The call

The clearest difference is in-app purchases: Commusoft at none against Gas Engineer Software's 1. Gas Engineer Software's advantage is iOS requirement (15.0 vs 17.0). On price, review sentiment, update cadence and ads 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Gas Engineer Software ships an update weekly, Commusoft every 9 days. Both last shipped on November 6, 2026.

Scorecard2 real differences · 8 level
Gas Engineer Software versus Commusoft: the parameters behind the verdict, then further details
ParameterGas Engineer SoftwareCommusoft
PriceFreeFree
Rating—4.6 (7 ratings) — better
Positive reviews84.8% of reviews89.1% of reviews — better
Number of ratings—7 — better
Update frequencyWeekly — betterEvery 9 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size194 MB285 MB
Age rating4+4+
DeveloperSoftware Works for You LtdCommusoft Ltd

Customer experience

Gas Engineer Software

Written reviews66 reviews
Positive84.8%
Neutral3.0%
Negative12.1%

Commusoft

All ratings7 ratings
Positive85.7%
Neutral14.3%
Negative0.0%
Written reviews64 reviews
Positive89.1%
Neutral4.7%
Negative6.3%

User reviews

Gas Engineer Software

From App Store reviews

What we love

  • 👍 Easy to use
  • ⏱️ Time saver
  • 💼 Professional appearance
  • 📈 Scales with business growth
  • 🛠️ Reliable day-to-day

Room to improve

  • 💰 Price keeps increasing
  • 📉 No real improvement seen
  • 😠 Greed perceived
  • ⚠️ Unexpected maintenance
  • ✍️ Small font size

Commusoft

From 7 App Store ratings

What we love

  • 👍 Easy to use
  • 🚀 Streamlines business operations
  • 📈 Helps business growth
  • 📧 Efficient invoicing and quoting
  • 📱 Great mobile app for engineers

Room to improve

  • 🐛 App crashes and bugs
  • 🐌 Slow syncing and uploading
  • 🔄 App restarts phone after update
  • 🗄️ Old app worked better
  • 🤔 Too rigid and unaccommodating

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
Show 1 more
  • Cheaper option for extra engineers

Commusoft

Reported bugs

9 issues
  • Issues clocking in/out
  • Problems accepting and traveling
  • App causes phone to restart
  • App issues syncing after uploading pictures
  • Office can't see job status updates
Show 4 more
  • Constant crashes
  • Unable to read previous jobs
  • Unable to scroll through to read
  • Trackers stop working for hours or days

Requested features

3 requests
  • Allow changing new design back
  • Improve admin version for smaller screens/tablets
  • More flexibility in system for different business needs

In-app purchases

1 purchases

Gas Engineer Software

One-time1
  • Single Engineer - 12 Months Subscription$19.00
None

Commusoft

No in-app purchases

Questions

Is Gas Engineer Software free?
Gas Engineer Software is free to download, with in-app purchases available.
Is Commusoft free?
Commusoft is free to download, with no in-app purchases.
Do Gas Engineer Software or Commusoft have ads?
Neither Gas Engineer Software nor Commusoft shows ads.
Which is updated more often, Gas Engineer Software or Commusoft?
Gas Engineer Software ships an update weekly, and Commusoft every 9 days. Most recently, Gas Engineer Software was updated on November 6, 2026 and Commusoft on November 6, 2026.

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