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
WhatPrice
WhatPrice tells you what a card is worth the moment you see it.
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.2
45 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/
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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 WhatPrice: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
WhatPrice tells you what a card is worth the moment you see it. Point the camera at a Pokémon card, a graded slab, or a sports card and get a market price, recent eBay sold comps, and 7- and 30-day trends in seconds. Add it to your collection with one tap and watch what your binder is worth over time. LIVE SCAN Watching a card break or a live auction? Start a Live scan and WhatPrice reads the cards as they appear on screen. Prices land in the Dynamic Island and a floating window, so you never have to leave the stream to know whether a card is a deal. WHAT YOU GET • Raw cards: catalog market price, variant (holo, reverse, etc.) and condition ladder • Graded slabs: PSA, BGS and CGC labels read automatically, priced at that exact grade • Sports cards: recent eBay sold listings and a median market price • Sold comps: the last real sales, with photos, so you can judge the price yourself • Trends: 7- and 30-day price movement for every card in your collection • Collection: inventory, portfolios, wishlist, purchase price and gain/loss • History: every card you have scanned, ready to re-price any time • Dynamic Island: live prices, recheck and add-to-collection without opening the app WHATPRICE PRO Pro unlocks Live scanning, on-screen price overlays and full portfolio history. Subscriptions renew monthly or yearly and can be cancelled any time in your Apple ID settings. WhatPrice is not affiliated with The Pokémon Company, PSA, BGS, CGC or eBay. Prices are estimates from public market data and are not guarantees of value. 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 >
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
Integrate with more stores for better comparisons
Assumption to check: Limited product availability comparison
Validate with people who use this workflow before building.
Hypothesis 2
Enable user-generated reviews and ratings
Assumption to check: Lack of user reviews for products
Validate with people who use this workflow before building.
Hypothesis 3
Implement wishlist functionality for users to save products
Assumption to check: No wishlist or favorites feature
Validate with people who use this workflow before building.
Hypothesis 4
Optimize search algorithms for faster results
Assumption to check: Slow search results
Validate with people who use this workflow before building.
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
Supabase
Zustand
React Navigation
Axios
BUILD KIT DIFFICULTY
Advanced
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.
