Home and familyMedium1 to 2 weekendsUnder $100Web app

Roommate Bills

Split rent and utility bills between roommates with automatic monthly reminders.

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The idea

Roommates set up their shared bills once with split rules, like even splits or by room size. Each month the app shows who owes what and sends reminders until everyone marks paid. It keeps money from getting awkward in a shared home.

Who it is for
Young adults sharing an apartment
How it makes money
Free for one household, $3 a month for receipt scanning and history exports
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 Roommate Bills. A user creates a household and invites roommates by link. Add recurring bills with name, amount (fixed or varies), due day and split rule (even, percent, or fixed amount per person).

PROMPT 2 OF 3

Each month create bill instances. For variable bills, let one roommate enter the amount or upload a photo of the bill, and use an AI model to read the total and due date. Show a balance screen with who owes whom and let people mark their share paid.

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PROMPT 3 OF 3

Send email reminders three days before due and on the due date to anyone unpaid. Add a yearly summary export. Add Stripe for the paid plan.

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