A variation approved before the crew leaves site
This contractor's subcontractor invoices took two to three weeks to check against the schedule, by which point the job had moved on. We built a field app that captures progress evidence on site, feeding an accounts agent that checks applications for payment against contract rates the same day.
Construction
- Services
- Mobile App Development, Accounts & Finance Agents
- Duration
- 11 weeks
- Year
- 2025
What was actually wrong.
Applications for payment were checked manually against the contract, retention terms and progress claims — a job for one overloaded quantity surveyor.
Site evidence for a variation arrived days after the work, usually as a phone photo with no context attached.
Overbilling was caught, when it was caught, after the payment had already gone out.
How we went at it.
Moved evidence capture onto the site itself
Photos, signatures and progress notes are captured on the field app at the point of work, offline where needed, timestamped and attached to the right line item.
Gave the accounts agent the contract, not just the invoice
Rates, retention and progress-claim terms are the agent's reference — every application is checked against what was actually agreed, not just what was billed.
Separated variations before they reached approval
Anything outside the base contract is flagged and evidenced on its own, so approval decisions are never made on a bundled, unclear total.
The build, in five panels.
Scroll the deck, or use the arrows. Everything here is also written out above and below.
What moved, and over what period.
Reported against the metric agreed before the engagement started.
“We used to find the overbilling a month later, if we found it at all. Now it's caught before the payment run.”
Built with
A control tower that finds the delay before the customer does
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