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
Morningstar Investor
Since 1984, Morningstar has served investors with the resources they need to make sound financial decisions
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.0
7,031 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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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 Morningstar Investor: map the core Finance 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
Offer more free features or a trial period to attract users.
Assumption to check: Limited free features that may frustrate users
Validate with people who use this workflow before building.
Hypothesis 2
Implement guided tours or tooltips to simplify user experience.
Assumption to check: Complexity in navigating financial data
Validate with people who use this workflow before building.
Hypothesis 3
Optimize data fetching and caching strategies to improve performance.
Assumption to check: Slow loading times for data-heavy screens
Validate with people who use this workflow before building.
Hypothesis 4
Provide clear information about what is included in free vs paid tiers.
Assumption to check: In-app purchases can be misleading
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
Since 1984, Morningstar has served investors with the resources they need to make sound financial decisions. Now you can experience the best of our flagship website with Morningstar Investor’s companion app. Morningstar Investor helps you refine your investing strategy and maximize your returns with our expert analysis and tools. Monitor the markets, access comprehensive investment data covering stocks, funds, ETFs, and CEFs, track your portfolio, and get ahead with the latest commentary, news, and analysis. Users who are registered with Morningstar Investor and Morningstar.com can log in to the mobile app to get seamless access to existing accounts. TOP FEATURES * Tools to monitor your portfolio, search for securities, and add securities to watchlists * Access to comprehensive data alongside our independent analysis and ratings, such as the Morningstar Rating for Stocks, Morningstar Economic Moat Rating, and Morningstar Medalist Rating for funds * Current global market barometers and index performance * Real-time security quotes * Top 10 gainers, losers, and most active securities PRIVACY POLICY: https://members.morningstar.com/memberstpages/PrivacyPolicy.html TERMS OF USE: https://smartphone.morningstar.com/service_p2/public/copyright.html ABOUT MORNINGSTAR, INC. Morningstar, Inc. is a leading provider of independent investment insights in North America, Europe, Australia, and Asia. The Company offers an extensive line of products and solutions that serve a wide range of market participants, including individual and institutional investors in public and private capital markets, financial advisors and wealth managers, asset managers, retirement plan providers and sponsors, and issuers of fixed-income securities. Morningstar provides data and research insights on a wide range of investment offerings, including managed investment products, publicly listed companies, private capital markets, debt securities, and real-time global market data. Morningstar also offers investment management services through its investment advisory subsidiaries, with approximately $294 billion in AUMA as of March 31, 2024. The Company operates through wholly- or majority-owned subsidiaries in 32 countries. For more information, visit https://www.morningstar.com/company/about-us.
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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
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Axios
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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.
