Build a quote tool for repeatable project estimates

A design studio is pricing a small brand refresh. The scope looks familiar, but the quantities have changed: two landing pages, six social assets, and one workshop. Reusing last month's document is quick until an old client name or rate survives the copy.

A quote app puts the reusable structure in one place. You enter the client, scope, quantities, and rates, then review the result as a quotation. Use this when you prepare similar estimates often enough that checking the copied document has become part of the job.

The short version

Specify your quote fields, currency, and calculation rules. Try editing and duplicating a quote in the example. Create your own tool and test its totals with known figures. Review the client details and terms before using a quotation.

Ask for the calculation and the document

Give the app explicit inputs and calculation rules. “Make an invoice app” leaves too much undecided: currency, rounding, tax treatment, and what the recipient is actually being asked to approve.

Start with an internal quotation tool:

Build an internal quote tool for a fictional design studio. Each quote
needs a quote number, issue date, valid-until date, client name and
address, project title, and terms. Let us add and remove line items
with a description, quantity, and USD rate. Calculate line totals,
subtotal, an editable tax percentage, and the final total. Use sample
items for two landing pages at $600 each and six social assets at
$80 each. Let us edit and duplicate quotes.

Use Build a live app on your canvas to create the app and manage its sharing and data permissions. Keep the financial details of real clients in mind when deciding who can view its records.

Try the studio quotation

The example includes a quote list, an editor, and a quotation preview. It shows the mechanics of preparing an estimate; its figures and terms are sample content.

1. Select a quote, change a line item's quantity or rate, and compare the subtotal and final total. Check the tax rate field rather than assuming the example matches your business.
2. Duplicate a quote and change the client or project details. Review the dates and terms too, since copying the line items is only part of preparing the next estimate.

Changes in this disposable preview reset on reload. It does not take payments or send a quote to a client.

Make revisions easier to check

Once the basic calculation works, improve the review step:

Add a short scope summary above the line items and a separate exclusions
section below them. Keep the current quotes and their calculation rules.

Test a zero quantity, a decimal rate, and a tax change before using real figures. Check the arithmetic against a calculation you trust. If your job needs invoice numbering or a particular tax format, specify and verify those requirements separately. A generated quotation or invoice layout still needs your review before it becomes a business document; this example does not establish accounting or legal compliance.