Submit an idea
World savingMedium2 weekendsUnder $100Mobile appWorld saving

Carbon Receipt

Scan a grocery receipt, see its carbon footprint.

Claim this idea Build it for me

Nobody has claimed this yet. Be first.

The idea

Snap your grocery receipt and see a simple footprint score for the trip, which items weighed the most, and easy swaps for next time.

Who it is for
Climate minded shoppers
How it makes money
Free app, paid version for families and teams
Suggested stack
Expo (React Native), Supabase for login and data
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 an Expo app called Carbon Receipt. The user takes a photo of a grocery receipt and AI extracts the list of items and quantities.

PROMPT 2 OF 3

Map each item to a food category and estimate its footprint using a simple lookup table stored in the app. Show a total and the top 3 heaviest items.

Claim free to unlockClaim this idea
PROMPT 3 OF 3

Suggest one lower footprint swap for each heavy item, and track the score over time on a chart.

Claim free to unlockClaim this idea

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 Carbon ReceiptEvery step spelled out for this idea, with the exact prompts to paste into your AI.
Open full playbook

More world saving ideas