LeftOver Marketplace App
Idea 250,426
(Working Names: “LeftOver”, “Project YardSale”, “AfterBuild”)
Problem
- After projects (construction, crafts, home improvement), there are often leftover materials.
- Storing leftovers is inconvenient. Selling them is tedious (FB Marketplace, Craigslist, etc.).
- Buyers want small quantities at a discount but don’t know where to find them.
- Leftovers often end up wasted, contributing to environmental issues.
Solution
- An app that uses receipt scanning (or manual entry) to build a digital inventory of purchased materials.
- When the project is complete, leftover materials are automatically listed in the app’s marketplace.
- Materials are priced with time-based markdowns (e.g., 1% off per day).
- Buyers can set target alerts to automatically purchase items when they hit a desired price.
- Pickup or delivery is arranged through the app.
How It Works (User Journey)
1. Purchase Phase
- User buys materials (Home Depot, Lowes, Amazon, etc.).
- User takes a picture of the receipt.
- App uses OCR (Optical Character Recognition) to extract:
- Item names
- Quantities
- Prices
- Store location (optional)
Alternatively:
- User can manually enter materials not on receipts.
2. Project Completion
- User taps “Project Complete.”
- App prompts user to adjust quantities for what remains.
3. Marketplace Listing
- Remaining materials are posted automatically:
- Initial price based on retail (or discounted).
- Auto-decreasing price (e.g., 1% per day).
- Option for “Make Offer.”
4. Transaction & Pickup
- Buyers browse local listings.
- Buyers can save items and set price drop alerts.
- When price hits, buyer purchases through the app.
- Pickup or delivery arranged via in-app messaging.
Example
You build a deck:
- Receipt uploaded: 100x 2x4s, 5000 screws, 20 bags of concrete.
- After finishing:
- 25x 3ft 2×4 scraps
- 1.5 boxes of #8 1-5/8″ screws
- 3x 80lb bags of concrete
- App lists them:
- Concrete bags: $12 each → 1% off/day
- 2×4 cutoffs bundle: $15 → 1% off/day
- Screws: $10/box → 1% off/day
- A buyer sees a deal a month later and purchases concrete at $9 per bag.
Core Features
| Feature | Description |
|---|---|
| Receipt scanning OCR | Quickly add purchased materials. |
| Manual item entry | Enter materials not listed on receipts. |
| Project inventory management | Track materials during and after projects. |
| Auto-list leftovers | Instantly post extra materials for sale. |
| Auto-price decay | 1% per day markdown (customizable). |
| Buyer watchlists | Save items and set price alerts. |
| In-app messaging & scheduling | Coordinate pickups securely. |
| Payment processing | Handle transactions through the app. |
| Donation option | Donate unsold items after X days. |
Future Add-Ons
- Partner with retailers (Home Depot, Lowes, Menards) for receipt parsing.
- Delivery service integrations (Roadie, uShip, etc.).
- Expand to craft supplies, garden supplies, etc.
- Loyalty rewards program for recycling.
Visual Concept
Optional: Create a rough flow diagram or app screen mockups.
Slogan Ideas
- “Build. Finish. Sell. Repeat.”
- “Every Project Ends With Possibility.”
- “Less Waste, More Worth.”
- “Turn Leftovers into Leftover Cash.”
