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
Simply Wall St
Simply Wall St is the only end-to-end platform built for the long-term investor.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
2,407 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 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 Simply Wall St: 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 insights or analyses to attract users.
Assumption to check: Limited free features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the linking process or provide better UX.
Assumption to check: Complexity in linking brokerage accounts
Validate with people who use this workflow before building.
Hypothesis 3
Enhance backend to provide real-time stock data.
Assumption to check: Inconsistent data updates
Validate with people who use this workflow before building.
Hypothesis 4
Include a tutorial or guided walkthrough for new users.
Assumption to check: Overwhelming for beginners
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
Simply Wall St is the only end-to-end platform built for the long-term investor. We've created a Portfolio Command Center where 7 million investors come to see the full picture. By combining portfolio tracking and analysis, institutional-grade research, and daily market updates - we give you the power to look past the volatility and stay the course. At the heart of our platform is Narratives - an investing strategy used by the world's most successful investors. Narratives allow you to build, track, and follow a clear thesis for every stock you own - empowering investors to make decisions based on fundamentals rather than hype. The result? You don't just own the stocks - you own the story. HOW DOES IT WORK? Simply Wall St brings everything together - your portfolio, your research, and the market - into one clear, organized view. IMPORT YOUR PORTFOLIO, QUICKLY AND SECURELY It's time to retire the manual spreadsheets and fragmented data. Get a true view of your portfolio in one place - because you can't master what you can't see. FINALLY SEE THE FULL PICTURE Clearly analyze your true performance, dividend health, and intrinsic valuation. We help you spot the hidden risks before they become headlines. FIND YOUR NEXT HIDDEN GEM Stop the countless hours of research. We give you the discovery tools you can use to customize and surface the data points that matter across 120,000 global stocks. ACT WITH REAL CONVICTION Stop reacting and start deciding. Validate every move with trusted insights and daily market updates - so when you make a move, you do it with confidence. Explore our premium features or stick with our 'free forever' plan. While the Simply Wall St app is primarily available in English, we are excited to announce that our company reports are now available in Spanish, German, Korean, Japanese, French, Italian, Dutch, Turkish and Swedish. We are continuously working on translating more sections and plan to make the entire app accessible in multiple languages in the future. Stay tuned for more updates!
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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.
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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.
