Change orders and T&M tags
ChangeProof
Get paid for the work nobody wrote down. Price the extra work, get it signed on site, export the PDF before you leave.
Extra work starts with “just do it, we’ll sort the paperwork later”.
Months later the paperwork is the argument. ChangeProof turns that moment on site into a priced, signed document — while the person who asked for the work is still standing next to you.
Describe the work and record who authorized it — the field that decides who pays.
Price labor by person and rate, with overtime as its own line. Add materials, equipment and markup.
Attach photos of what you actually did.
Collect both signatures on the screen, then export one PDF.
Built for the field, not the office.
Works fully offline — no signal needed on a slab or in a basement. No account, no login, no subscription. Tags stay on your iPhone and carry sequential numbers, so “T-014” means something to everybody on the job.
The total adds up as you type, so a rate typed into an hours field is obvious immediately.
One-time purchase per PDF export. Nothing recurring.