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
msrp.fun - Tcg deal alerts
Stop refreshing tabs
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
14 ratings · Top 15%
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 included18 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for msrp.fun - Tcg deal alerts: 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
Introduce advanced filtering and sorting features to enhance user experience.
Assumption to check: Limited filters and sorting options
Validate with people who use this workflow before building.
Hypothesis 2
Implement push notifications with alerts to keep users informed about deals.
Assumption to check: Notifications are often missed by users
Validate with people who use this workflow before building.
Hypothesis 3
Design a cleaner, more organized layout to improve navigation and usability.
Assumption to check: User interface can be cluttered
Validate with people who use this workflow before building.
Hypothesis 4
Add social sharing options for deals to increase user engagement and attract new users.
Assumption to check: Lack of social sharing features
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 refreshing tabs. Let msrp.fun snipe the deal for you. msrp.fun watches the marketplaces where One Piece TCG, Dragon Ball Super Card Game: Fusion World, and Gundam Card Game product gets listed underpriced — then sends an iOS push the moment a real deal appears. You set the target price; we do the watching. Track what you actually want • Sealed product — booster boxes, cases, and displays • Raw singles — by card number, art variant, and condition How it works: Set a target pull up any card or sealed item and name the most you'd pay. We scan continuously TCGPlayer, 100+ independent Shopify card shops, CardTrader, and TikTok Shop, refreshed around the clock (eBay coming soon). AI filters the noise every candidate runs through an AI check that rejects live breaks, proxies, wrong sets, and graded-as-raw look-alikes, so you only hear about real matches. You get the alert — a real-time push with the listing, the price, and your target. Tap straight through to buy first in line. Built for collectors and resellers who hate overpaying Whether you're hunting a sealed case under market or a specific alt-art single at the right condition, msrp.fun is the always-on watch that never sleeps. Supported games: One Piece TCG, Dragon Ball Super Card Game: Fusion World, and Gundam Card Game, with more on the way. Privacy Policy: https://msrp.fun/privacy Terms: https://msrp.fun/terms
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.
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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.
