Free Invoice App for
NZ Tradies & Mechanics
Spanner is a free invoice app for New Zealand tradies, mechanics, and small business owners. Create GST invoices in NZD with your NZBN, collect card payments via Stripe, and share via WhatsApp or PDF — all from your phone.
Free to download · Pro from NZ$12.99/mo · No credit card
Who is Spanner for?
Built for NZ tradespeople
Spanner handles GST, NZD, NZBN, and the way NZ tradies actually work — invoice on the job, get paid by card, share via WhatsApp. No laptop, no spreadsheets.
GST invoicing (15%)
NZ GST calculated automatically and shown clearly on every invoice. Toggle on or off per job.
NZBN on every invoice
Enter your NZBN once — it appears automatically on every invoice you send.
NZD invoicing
All amounts in New Zealand dollars. Professional invoices your customers expect.
Card payments via Stripe
Every invoice gets a payment link. Customers pay in NZD from their phone — same day.
WhatsApp & PDF sharing
Share invoices the way NZ tradies communicate — WhatsApp message with PDF attached.
Mechanic-ready
Vehicle rego, make, model, year on every invoice. Full vehicle history per customer.
How to send a GST invoice in 3 steps
Create the invoice
Add customer, line items, toggle GST. Spanner calculates 15% and adds your NZBN automatically.
Share it
Send via WhatsApp, email, or PDF. Professional invoice with your business name, NZBN, and GST breakdown.
Get paid
Customer pays by card in NZD. Payment confirmed immediately — no more waiting for bank transfers.
What NZ tradies say
"GST done automatically, NZBN on the invoice, and customers can pay by card. All I needed as a tradie."
Hamish K. · Auckland, NZ
"Send the invoice before I even leave the driveway. Customers pay the same day. Best change I made to my business."
Craig W. · Wellington, NZ
"WhatsApp invoicing in New Zealand is a game changer. Customers actually read what I send them now."
Ben T. · Christchurch, NZ