At Checker, we make life simpler for engineers and tradespeople across the UK and Ireland. We provide fast, powerful tools to manage certificates, records & reports (Digital paper work), jobs, and customer relationships — all from one easy-to-use app.
Built by engineers, for engineers, Checker streamlines how you work, helping you ditch paperwork and run your business smarter. Whether you’re in the heating, gas, plumbing, electrical, renewables, or oil heating business, Checker gives you everything you need to stay compliant, organised, and ahead of your competition.
Thousands of professionals trust Checker App every day to save time, reduce admin, and win more business.
Take a look to see how our users use Checker to help then save time money and become more productive. Mark uses Checker to make him more efficient, he creates all his work records and reports in the app, then copies that with a press of a button into an invoice, send the invoice to his customer by email or text, he then takes payment with he Checker x Zettle Chip and Pin Integration and then all that syncs to his Xero accountancy package for his annual accounts.
Launching Gas Checker (now Checker) launched in 2012 from a pipe dream from one man — A Gas engineer who wanted to use the growing popularity of smart phones and tablets and use that to help him grow and operate his plumbing business more smoothly.
Gas Checker grew significantly within the first few years allowing its to re invest in the software and even more tools to help engineers.
in 2025 Gas Checker became Checkerand after a 2 year re-build from scratch launched into the electrical, renewable energy and air-con/refrigeration sectors with a brand new iOS , Android and Web app.
No pre-payment necessary, just register and get 30 days of use absolutely free.
We’ve come along way as a software provider over the last few years and our plan is to continue to grow the software, adding more features, more sectors and helping even more Plumbers, Heating Engineers, Electricians and Renewable Energy Installers run and grow their business.
8900
2021
10768
2022
13897
2023
16.344
2024
19.000
2025
