Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
App Overview
Garage Sale Map - gsalr.com
Garage Sale Map helps you find garage sales, yard sales, and estate sales near you on a map.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.3
1,791 ratings · Top 30%
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Differentiate and validate
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Garage Sale Map - gsalr.com: map the core Shopping workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Implement advanced filters for date, distance, and categories.
Assumption to check: Difficult to find specific sales due to limited filters.
Validate with people who use this workflow before building.
Hypothesis 2
Create user accounts for saving favorite sales and viewing history.
Assumption to check: Lack of user profiles for tracking favorites.
Validate with people who use this workflow before building.
Hypothesis 3
Allow user-generated reviews and ratings for sales.
Assumption to check: Inconsistent information about sales.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance the map with additional features like directions and real-time updates.
Assumption to check: Limited map functionality.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Garage Sale Map helps you find garage sales, yard sales, and estate sales near you on a map. The sales listed come from the largest network of garage sale websites including Gsalr.com, YardSaleSearch.com, GarageSaleFinder.com, YardSales.net, GarageSalesTracker.com, PostMyGarageSale.com, and EstateSales.org. There are thousands of new sales listed every week all over the United States. - Find sales near you. - Browse sales on a map or list. - Get complete driving directions to each sale. - Save sales to your favorites list. - Search sales for specific items. - Filter sales by the day of the week. - Add your sale and make some money. Questions, comments, or feature suggestions? Please email us at [email protected]. All feedback is welcome!
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
React Navigation
Axios
@react-native-maps
Firebase
BUILD KIT DIFFICULTY
Intermediate
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.
