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
Thriftmap: Find Thrift Stores
Stop digging through the wrong racks
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.3
147 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 included17 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 Thriftmap: Find Thrift Stores: map the core Navigation 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
Enhance store detail pages with more comprehensive information.
Assumption to check: Limited store information such as descriptions and images.
Validate with people who use this workflow before building.
Hypothesis 2
Improve location accuracy by integrating user-submitted data.
Assumption to check: Inaccurate locations or missing stores.
Validate with people who use this workflow before building.
Hypothesis 3
Implement offline maps and saved store features.
Assumption to check: No offline functionality for map access.
Validate with people who use this workflow before building.
Hypothesis 4
Add user-generated content and ratings for stores.
Assumption to check: Lack of community features like reviews or ratings.
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
Stop digging through the wrong racks. Thriftmap is the ultimate discovery tool for sustainable fashion, vintage furniture, and hidden flea market gems in your city. Whether you are looking for curated vintage boutiques, massive weekend flea markets, or local charity thrift shops, Thriftmap aggregates the best secondhand shopping into one clean, searchable map. Key Features: Flea Market Radar: Instantly locate pop-up flea markets and antique fairs, complete with operating hours and vendor details so you never show up to an empty lot. Smart Filtering: Looking specifically for retro clothing, mid-century furniture, or rare antiques? Filter stores by category to find exactly what fits your aesthetic. Transform the way you shop secondhand. Download Thriftmap and discover your next favorite vintage piece today. A paid subscription is required to access Thriftmap's map and features. Thriftmap Pro is $27.00/year, billed to your Apple ID and auto-renewing until canceled; manage or cancel anytime in your App Store settings. See terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
react-native-async-storage
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.
