PetsEasy1 weekendUnder $100Web appWeekend build

Pet Cost Split

Co-owners and roommates split pet costs without awkward math.

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The idea

Roommates, couples or families who share a pet log food, vet bills and supplies with who paid. The app keeps a running balance of who owes whom. Sharing a pet stays fun instead of turning into money arguments.

Who it is for
Roommates and couples who share a pet
How it makes money
Small one-time unlock for extra pets and 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 mobile friendly web app called Pet Cost Split. A user creates a pet group, adds the pet name and invites co-owners by email. Set the default split as equal or custom percentages.

PROMPT 2 OF 3

Add expenses with date, category (food, vet, supplies, grooming, boarding, other), amount, who paid and optional receipt photo. Show a running balance of who owes whom and a settle up button that records a payment.

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PROMPT 3 OF 3

Add a monthly summary by category and a CSV export. Add a one-time Stripe unlock for multiple pets and exports.

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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 Pet Cost SplitEvery step spelled out for this idea, with the exact prompts to paste into your AI.
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