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
SankeyChart
SankeyChart helps you turn complex data into clear, actionable insights with beautiful Sankey diagrams.
$0.29
PRICE
$0.29
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included15 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 SankeyChart: 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 customizable charts and reports.
Assumption to check: Limited financial visualization options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement AI-based categorization for better accuracy.
Assumption to check: Difficulties with transaction categorization
Validate with people who use this workflow before building.
Hypothesis 3
Provide interactive tutorials and FAQs.
Assumption to check: Lack of user support and onboarding
Validate with people who use this workflow before building.
Hypothesis 4
Focus on a cleaner, more simplified design.
Assumption to check: User interface may feel cluttered
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
SankeyChart helps you turn complex data into clear, actionable insights with beautiful Sankey diagrams. Now supports SVG export and smarter label handling for cleaner, more professional charts. Whether you are analyzing revenue, tracking user flows, or studying complex systems, SankeyChart makes your data easy to understand at a glance. Why users choose SankeyChart: • Create Sankey diagrams in seconds - no learning curve • Import CSV data instantly and visualize flows with ease • Drag and drop nodes to refine your data structure visually • Export high-quality charts in PNG, JPG, PDF, and SVG • Automatically hide overlapping labels for better readability • Clean, distraction-free interface focused on your data • Works across iOS, macOS, and visionOS Perfect for: • Business analytics and revenue flow tracking • Finance and budget visualization • Marketing funnels and user journey analysis • Energy and resource flow analysis • Supply chain and logistics tracking • Research, education, and data modeling • Project management and workflow visualization Stop struggling with spreadsheets and complex data. Start creating clear, professional Sankey diagrams in minutes. Download SankeyChart now and turn your data into insights.
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
Victory Native
React Navigation
Axios
Zustand
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.
