Whether you're plumbing a 200-plot development or running service vans across the county, DuoApp keeps jobs, engineers, sign-offs and invoicing in one app your team will actually open - with CIS, retention and compliance paperwork handled properly.
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The work is on site and in the vans. The admin ends up on the kitchen table at 9pm. These are the problems plumbing and heating firms tell us about most.
Which plots are first-fixed? Which are waiting for second fix? Which boilers are in but not commissioned? You only know once you've rung the lads.
Jobs get finished but never make it onto an application, and variations agreed on site are lost in a WhatsApp thread by the time you invoice.
Deductions, verification status, retention held and retention due - tracked by hand, and wrong just often enough to hurt.
Gas Safe registration, unvented (G3) certificates, CSCS cards and insurance - nobody notices until a main contractor turns someone away at the gate.
A leak months later and the main contractor wants to know if it was pressure tested. Without a signed-off record and photos, it's your word against theirs.
Timesheets on paper, merchant receipts in the footwell and mileage guessed at the end of the month.
Everything below is included in the same £10 per user, whether you're two vans or fifty engineers.
Break each job down into first fix, second fix, commissioning and anything else you price for. Assign the work, track progress plot by plot, and complete dozens of tasks at once when a block is done. Annual services and planned maintenance can repeat on their own.
Bill at a fixed price per plot or stage, split labour and materials, or run your own subcontractors with staged claims - all on the same platform.
Deductions, verification status, retention and releases sit on every invoice, so what you're owed and what you owe is always worked out for you.
Checklists for each stage, from first fix to commissioning, with photos and signatures attached. If something is queried later, you can show exactly what was checked, by whom and when.
Store Gas Safe registrations, G3 and other qualifications, CSCS cards and insurance against each engineer. DuoApp warns you before anything expires, and can block work for anyone whose documents aren't current.
Gas Building Regulations certificates, CP12 landlord gas safety records, Benchmark and G3 unvented checks from ready-made templates. Only Gas Safe registered engineers with in-date records can sign, the customer signs on your phone, and the branded PDF goes straight to them.
Raise a variation from site on your phone, send it for sign-off and keep a full audit trail, so extra work turns into extra money.
Hours are captured against the job as the work happens, giving you one accurate view of labour cost per job - and payroll without the Friday chase.
Log callbacks and defects after handover, schedule the visit, and sign it off with photos, so warranty work is tracked rather than lost.
Most plumbing and heating firms we speak to run the business on paper job sheets, group chats and a spreadsheet for CIS. Here's what changes.
If your team can use WhatsApp, they can use DuoApp. There's no training day and no IT department needed, and every new team gets a free onboarding session with a real person.
No consultants and no setup fee. Every new team gets a free onboarding session with a real person.
Create your live jobs and developments, with plots, stages and prices.
CIS, retention and the checklists you use for each stage.
They download the app on iOS or Android and log in. No training day needed.
Progress, sign-offs, hours and what's ready to claim, all in one place.
No tiers, no per-site fees and no setup charge. Add and remove people as your team changes and you are billed pro-rata.
The same platform runs teams across construction and the trades.
Bring a real job, your CIS setup and the way you price. In 30 minutes you'll know whether DuoApp fits - no slide decks, no pressure.