For HVAC Contractors

Change Order App
for HVAC Pros.

A mini-split added to the bonus room, duct that has to be replaced, a return that was never sized right — write it up on your phone, run your markup and tax automatically, and get both signatures before you braze the next joint. Free, 100% offline, no account.

Open the Free App →

No download · No signup · Works with zero signal

Sound familiar?

You're mid-changeout and the homeowner asks: "That bonus room over the garage never cools right — while you're here, what would a mini-split run?" Good question, good add, and real work you should be paid for.

Or you get into the attic and find the flex crushed flat and a return half the size the new unit needs. Either way: drop the line items in your phone — equipment, duct, labor — the app figures your markup and local tax, you both sign on the screen, and they get a clean PDF before you head back up the ladder. Clear agreement, happy customer, no surprises at the invoice.

1

Write up the extra work as line items

2

Markup & tax figure themselves

3

Both sign on the phone — PDF done

Questions HVAC contractors ask

Does it work in an attic or mechanical room with no signal?

Yes. It's 100% offline. Once it's on your phone, you can write, sign, and generate change order PDFs with zero bars.

Can I write up duct repairs I find during a changeout?

That's exactly what it's for. Write the added work as line items, the app figures markup and tax, and the customer signs on your phone before you continue.

Is it really free?

Yes — no account, no password, no monthly fee. A one-time $29.99 Suite Pro upgrade puts your company logo on every PDF — across all three DFS apps.

Get it signed before you pick the next tool up.

Open the Free App →