Kitson Spreadsheet Formula Builder (Kitson Pro app)

For educational purposes only. This app explains, summarises and drafts. It is not legal, financial, tax, medical or other professional advice, and what it writes can be wrong. You are asked to accept this when you first open the app.

Describe what you want. Get the Excel or Google Sheets formula, explained, with test cases to run yourself.

WHAT IT DOES

Describe your sheet and what you want to work out, in your own words. You get the formula for Excel or Google Sheets, an explanation of every piece, test cases worked by hand that you can run yourself, and the mistakes to avoid.

WHAT MAKES IT A PRO APP

• Guided questions and a built-in sample, so you never face a blank box
• A finished document you can download as a Word file or print
• "Why I suggested this" and "Check these yourself" on every finished document
• When it quotes your document, the app checks the wording and marks any quote it cannot find (pasted text and Word files; it cannot search PDFs)
• The cost shown before each run and after it, and a limit you set for one run
• A "change this" box to revise the result without starting again (each change is charged as another run)

WHAT YOU NEED (PLEASE READ BEFORE BUYING)

• Windows, Mac or Linux, and free Node.js 18 or newer
• Your own Anthropic account and key (platform.claude.com). This is separate from a Claude chat subscription, which does not include it.
• You pay Anthropic for what you use, on top of the price of the app. In our own tests on short sample documents, a run of this app cost about 9 cents to 16 cents. Longer documents cost more.
• Anthropic credit is bought in advance. Anthropic says it cannot be refunded and expires after a year, so buy a little at a time.
• About ten minutes of setup. A step-by-step guide is included.

HONEST LIMITS

It cannot see your real file, so it relies on your description. Always run the test cases before you trust the formula with real numbers.

PRIVACY

What you type, paste or upload is sent to Anthropic to be processed, under Anthropic's terms. It is not sent to us. This is not an offline app. Do not put in anything you are not allowed to share. Your key is stored only on your computer and is sent only to Anthropic.

WHAT IS INCLUDED

The app (a zip file), start files for Windows, Mac and Linux, a setup guide and a README. It uses Claude Opus 5.5. You can switch to Claude Sonnet 5.5 in Settings: its prices are half of Opus's (we did most of our testing with Opus). Kitson Workshop is not affiliated with or endorsed by Anthropic.

REFUNDS

Digital download. If we cannot get it running for you, email kit376351@gmail.com within 14 days for a refund of the app price. Credit you bought from Anthropic is theirs to refund or not.

WHAT SHOULD WE BUILD NEXT?

Email kit376351@gmail.com with the subject "Kitson idea" and tell us what you would like an app for.