The Fastest Voice Invoice Generator for Gmail (One Button. Done.)
There's a question that keeps coming up in search: "what's the fastest way to send an invoice?"
The answer isn't a template. It isn't a new app. It's a button that lives in your Gmail sidebar. You press it when a job request is open, and the invoice is built before you've finished reading the email.
That's not a pitch. Watch the demo.
Watch: The Fastest Voice Invoice Generator in Gmail (40-Second Demo)
Forty seconds. One button. Full itemised invoice. Cover letter written. Sent.
If that looks too easy to be real, here's what's actually happening under the surface.
What "From Email" Actually Does
When a customer emails asking for a quote, most of what you need to send a proper invoice is already sitting in that email. Their name is there. Their email address is there. The job description is there.
The manual process forces you to copy all of that into a different application, look up your prices, do the maths, generate a PDF, come back to Gmail, write a cover email, and attach it. Fifteen minutes minimum.
The SMASH From Email button does every one of those steps in a few seconds:
- Reads the email — customer name, email address, and job description are extracted automatically
- Matches the job to your catalog — services and materials are mapped to your pricing and rates
- Builds the itemised quote — line items, quantities, prices, GST — all assembled in the sidebar
- Writes the cover email — a short, professional reply is drafted with your quote attached
You review it. If everything looks right, you click Copy to Gmail and send. If something needs adjusting, you change it in the sidebar and then send.
The whole sequence: under 60 seconds.
Why This Works Better Than Every Other Approach
| Method | Time | Typing | Switching tabs |
|---|---|---|---|
| Manual entry in Xero or QuickBooks | 15–25 min | All of it | Yes — 4+ tabs |
| Filling a Word/Excel template | 10–15 min | Most of it | Yes |
| Basic invoicing app | 5–10 min | Some | Usually yes |
| Replying with a rough estimate | 2–3 min | Yes | No — but it looks unprofessional |
| SMASH From Email | Under 60 sec | None | Never — lives in Gmail |
The reason nothing else comes close is simple: every other method requires you to move information from one place to another by typing it. SMASH reads the source — the customer's email — and builds directly from it.
The Cover Letter You Didn't Have to Write
One detail from the demo that's easy to miss: when you copy the quote into your Gmail reply, SMASH generates the covering message for you.
Not a canned template. A short, properly-worded email that references the job, introduces the attached quote, and tells the customer what to do next. You don't write it. It's there when you paste.
That matters more than it sounds. A lot of people delay sending quotes not because the pricing is hard — it's because writing a professional covering email when you're tired takes mental energy you don't have at the end of the day. SMASH removes that friction entirely.
From Email vs. Voice Recording — When to Use Each
SMASH has two main ways to build a quote from scratch:
From Email is best when:
- The customer's email clearly describes the job
- You're quoting from a desktop or laptop
- You want the fastest possible turnaround on a straightforward enquiry
Voice recording is best when:
- You need to add details the email didn't include (materials used, extra hours, fees)
- The job came in over the phone or in person, not by email
- You're on site and want to invoice before you drive away
Most people end up using both regularly — From Email for straightforward desk-based quoting, voice recording for jobs that need more detail or came in through other channels.
What Tradies and Service Pros Are Saying
"I thought the demo was sped up. I timed myself doing it and got 38 seconds on my first proper attempt. It's that fast." — Dean V., electrician, Canberra
"The bit that got me was the cover letter. I didn't notice it until I looked at what I'd sent. SMASH had written a proper email for me and I hadn't typed a word." — Sophie B., cleaner, Gold Coast
"I had four enquiries sitting in my inbox when I installed it. Cleared all four in under five minutes. Never done that before." — Aaron L., handyman, Melbourne
Your inbox has quotes in it right now.
Install SMASH and send the first one in under 60 seconds. Free. No credit card.
Add SMASH to Chrome — FreeThe Pricing Catalog Is What Makes It Accurate
One thing the demo doesn't show is what's running in the background: your Pricing DNA.
When SMASH reads "replace kitchen mixer tap, two hours labour, call-out fee" from a customer's email, it doesn't guess at prices. It matches each item to your uploaded pricing catalog — your rates, your materials, your fees. The invoice that comes out is priced at exactly what you charge, not some average from the internet.
You set this up once when you sign up — upload an old invoice PDF or a CSV of your services and SMASH builds your catalog from it. After that, every quote it generates reflects your actual business.
Related Reading
Frequently Asked Questions
What is the 'From Email' button and how does it work?
From Email is a one-press feature inside the SMASH Gmail sidebar. When a job request email is open, pressing From Email tells SMASH to read the email body, extract the customer's name and contact details, identify the requested services or materials, and build a fully itemised, priced quote using your catalog — all without you typing a word. The whole process takes a few seconds.
Does the invoice include a cover letter?
Yes. When you copy the quote into your Gmail reply, SMASH generates a short, professional covering message automatically. You don't write it — it's written for you based on the job context. You review it, hit send, done.
Is this different from the voice recording feature?
The From Email button and the voice recorder are two separate entry points. From Email works when the customer's email describes the job clearly enough for SMASH to extract it. Voice is better when you need to add details that weren't in the email — materials used, extra hours, call-out fees — or when you're quoting a job that came in over the phone.
How accurate is the auto-fill from the email?
Very. SMASH reads the customer's name, email address, and job description from the open thread. Line items are matched to your pricing catalog, so the prices that come out are your actual rates, not guesses. You review everything before sending — if something looks off, you adjust it in the sidebar before hitting copy.
Can I use this on mobile as well as desktop?
SMASH is a Chrome extension, so it runs in Chrome on desktop and laptop. For mobile invoicing on the go, the SMASH iOS app covers the same workflow from your phone.
What happens after I send the quote?
Your customer receives a clean email with the itemised quote and a portal link. They can approve it and pay from their phone. You get a read receipt when they open it and a payment notification when they pay. The completed invoice can be exported to Xero or QuickBooks in one click.