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AI agentsMedium2 weekendsUnder $100Web app

Nudge Writer

Sends new software users a personal follow up email based on what they did.

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The idea

Small software makers send the same welcome emails to everyone. Nudge Writer receives simple usage events, notices users who got stuck at a step, and drafts a short personal email pointing them to the next step. Founders approve or let it send.

Who it is for
Indie software founders
How it makes money
Monthly subscription by active users
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 Nudge Writer. Start with login, a Project page with an API key, a list of onboarding steps the founder defines (like created first project, invited teammate), and a short product description.

PROMPT 2 OF 3

Add an events endpoint that records user id, email, name, event name and time. Each day find users who signed up 2 or more days ago and did not reach the next step. Have an AI model draft a short plain email for each, using the product description and the step they missed.

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PROMPT 3 OF 3

Show drafts in an approval queue with an auto send option, track opens and whether the user completes the step afterwards, and add Stripe billing.

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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 Nudge WriterEvery step spelled out for this idea, with the exact prompts to paste into your AI.
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