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AI agentsEasy1 weekendUnder $100Web appWeekend build

List Tidy

Cleans a messy customer contact list: fixes names, merges duplicates, flags junk.

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The idea

Small businesses have contact lists full of duplicates, all caps names and bad emails from years of forms. List Tidy takes a CSV, uses rules and AI to fix formatting, merge duplicates and flag junk rows, and returns a clean file with a change log.

Who it is for
Small business owners preparing an email list or CRM import
How it makes money
Pay per file cleaned
Suggested stack
Next.js, MySQL, Tailwind, hosted on a small VPS
Launch cost
Under $100

Your first AI prompts

Paste these into Claude, Cursor or Lovable, in order. Check that each one works before moving on.

PROMPT 1 OF 3

Build a web app called List Tidy. Start with a CSV upload page, a column mapping step (first name, last name, email, phone, company, address) and a preview of the first 20 rows.

PROMPT 2 OF 3

Clean the data: trim spaces, fix name casing, normalize phone formats, validate email syntax, and find duplicates by email, phone or similar name. Use an AI model only for ambiguous merges and to flag junk rows like test entries. Show a review screen with each proposed change.

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PROMPT 3 OF 3

Let the user accept all or per change, download the clean CSV plus a change log, and add Stripe checkout priced by row count.

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The 10 step playbook

  1. 01Claim your ideaPut your name on it and unlock every prompt and the full playbook. Always free.
  2. 02Domain and nameBrainstorm a short name, check the .com, and register it.
  3. 03Trademark basicsSearch for conflicts before you fall in love with the name.
  4. 04AI build kickoffPaste the prompts below into Claude, Cursor or Lovable, one at a time.
  5. 05Server and hostingPick a host and have your AI walk you through setup.
  6. 06Backend and dataLogins, database and payments, one prompt at a time.
  7. 07Frontend and designScreens, colors and a simple logo that look professional.
  8. 08Go livePut it online, then submit to the App Store and Google Play if it is a mobile app.
  9. 09Marketing planLaunch posts, local outreach and your first 100 users.
  10. 10Launch and growShip it and add your live link to earn the Shipped badge.
Your full playbook for List TidyEvery step spelled out for this idea, with the exact prompts to paste into your AI.
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