for electricians, plumbers, hvac, fire & security and gas. plan the round in the morning, send the engineer with the customer's address and the right form, they sign it off on their phone, and it comes back ready to invoice. you never re-type it at a desk in the evening.
the on-site forms are built for trade work, not generic checklists — the kind of layout a trade engineer recognises. fill them in on the phone, sign, store them against the customer's record so they're there next time. spent a real day getting the BS 7671 EICR template right because the people using it would notice if we hadn't.
the people in the office get the full platform at £39. the engineers who never open a laptop get a £12 mobile seat — the job list, the form, sign-off, time entry, nothing they don't need. add as many as you've got vans.