Service reports for sewage treatment plants — finished before you leave site.

A mobile app for STP engineers: complete the service sheet on any phone, offline, with photos, voice notes and signatures — and hand the customer a branded PDF on the spot.

No app store, no installation project — it runs from a link and works with no signal.

Built for the industry, not adapted to it

OffMains reproduces real service paperwork field-for-field — the VORTEX 12-monthly service sheet, a generic activated-sludge service, and manufacturer commissioning records — so engineers and warranty teams see the form they already know, just impossible to leave half-finished.

📶

Works fully offline

Rural sites rarely have signal. Every record, photo and signature lives on the device and syncs nothing until you say so.

📊

Your spreadsheet, one tap

Import your existing customer Excel; re-imports update rather than duplicate. New customers added at the gate.

🔁

Shared tanks handled

Two owners, one tank? One visit produces personalised reports for both. Groups of 3+ get a single group report.

🎙️

Voice, photos & signatures

Dictate comments, attach captioned photos, capture engineer and customer signatures with a fingertip.

📄

Branded PDF on the spot

A professional A4 report with your logo, emailed from the driveway or saved to your cloud drive.

🛡️

Warranty-grade commissioning

Manufacturer installation records with mandatory fields and enforced photo evidence — complete, legible, same-day.

Simple pricing

Less than half the cost of generic job-management software — and it actually knows what an SSV30 reading is.

Solo engineer

£19
per month, or £190/year
  • All features, one engineer
  • Your logo on every PDF
  • Unlimited customers & reports

Team

£15
per user / month (min 3 users)
  • Everything in Solo
  • Shared customer base across devices
  • Admin overview (rolling out with pilot feedback)

White-label

£1,500
setup + £12 per user / month
  • Your brand throughout
  • Your own service templates
  • Your own web address

Tank manufacturers and merchants: per-tank bundle licences available — ship a year of OffMains with every unit sold. Talk to us.

Running a pilot is free

We set your team up personally — logo, customer import, first report together — and shape the templates around your paperwork.

[email protected]