What's the easiest app for sending estimates?

For a one-person trade, Joist and Invoice Simple are quick and cheap. Jobber and Housecall Pro do more if you also want scheduling and a customer list. QuickBooks is best if you already use it for accounting.

Can customers approve an estimate from their phone?

Yes. Modern invoicing apps send a link the customer taps to approve, often with a signature, and you get notified the moment they say yes.

How do I turn an estimate into an invoice?

In any decent app it's one button. The line items carry over, you mark what was actually done, and the invoice goes out with a pay link attached.

Should I ask for a deposit on big jobs?

For larger or material-heavy jobs, yes. A deposit covers your materials and confirms the customer is serious. Most apps let you request one as part of the estimate.

How do I send estimates and invoices online?

Updated June 28, 2026 · Running your business online

Short answer

Use a dedicated invoicing app like Jobber, Joist, Invoice Simple, or QuickBooks to create an estimate, text or email it as a link, and let the customer approve and pay in a couple of taps. The estimate converts to an invoice with one click, and a built-in pay button gets you paid faster than paper ever could.

To send estimates and invoices online, you use a purpose-built invoicing app to create the document, send it as a text or email link, and let the customer approve and pay from their phone. The estimate turns into an invoice with one tap, and a pay button means you collect money in days instead of weeks. No spreadsheets, no printing, no driving paperwork back and forth.

Pick the right invoicing app

Match the tool to your size. A solo handyman or painter is well served by Joist or Invoice Simple, both cheap and fast on a phone. A growing plumbing or HVAC crew that also wants scheduling and customer records should look at Jobber or Housecall Pro. If you already do your books in QuickBooks, its built-in invoicing keeps everything in one place. For the broader stack, see the online tools every trade business needs.

Build a clean estimate

A good estimate wins the job before price even matters. Use plain line items the customer understands, a clear total, and a short note on what's included and what isn't. Add photos if they help explain the work. Then send it as a link so the customer can approve it on the spot, often with a tap-to-sign.

Send the estimate the same day you visit, even if it's rough. The contractor who quotes first usually wins, and a fast link from your phone beats a polished PDF that lands three days later.

Turn it into an invoice and get paid

Once the work is done, convert the approved estimate to an invoice in one click and attach a pay button. Customers who can pay by card or bank transfer from the invoice itself pay far faster than those mailed a paper bill. To wire up card payments, read how to accept credit card payments as a contractor. For deposits and online pay buttons on your site, see take deposits or payments through your website.

Keep records without the shoebox

Online invoicing quietly fixes your bookkeeping. Every estimate, invoice, and payment is logged, searchable, and ready for tax time. You can see who hasn't paid, send a polite reminder with one tap, and stop losing money to invoices that slipped through the cracks.

Blank Theory builds fast trade websites that connect cleanly to your invoicing and payment tools, hosted and maintained for a flat $199/month. See a free preview of your site first, usually live in under 24 hours, before you pay a cent.

Frequently asked questions

What's the easiest app for sending estimates?: For a one-person trade, Joist and Invoice Simple are quick and cheap. Jobber and Housecall Pro do more if you also want scheduling and a customer list. QuickBooks is best if you already use it for accounting.
Can customers approve an estimate from their phone?: Yes. Modern invoicing apps send a link the customer taps to approve, often with a signature, and you get notified the moment they say yes.
How do I turn an estimate into an invoice?: In any decent app it's one button. The line items carry over, you mark what was actually done, and the invoice goes out with a pay link attached.
Should I ask for a deposit on big jobs?: For larger or material-heavy jobs, yes. A deposit covers your materials and confirms the customer is serious. Most apps let you request one as part of the estimate.