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
Fractal Universe
Explore Mathematical Infinity
$1.99 · In-app purchases
PRICE
$1.99
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 included16 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 Fractal Universe: map the core Graphics & Design 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
Implement a robust sharing feature to encourage user content creation.
Assumption to check: Limited community designs available for exploration.
Validate with people who use this workflow before building.
Hypothesis 2
Provide an onboarding tutorial for new users.
Assumption to check: Difficult to learn complex fractal design tools.
Validate with people who use this workflow before building.
Hypothesis 3
Optimize canvas drawing performance for lower-end devices.
Assumption to check: Inconsistent performance on older devices.
Validate with people who use this workflow before building.
Hypothesis 4
Add offline capabilities to allow users to create designs without internet.
Assumption to check: No offline functionality.
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
Explore Mathematical Infinity. Powered by Your Touch.Fractal Universe is the most intuitive and powerful fractal explorer ever designed for mobile. Built with cutting-edge WebGL technology and optimized for performance, it brings desktop-class 3D fractal rendering to your pocket—with zero learning curve. 25 Handcrafted Mathematical Worlds From legendary classics like the Mandelbulb and Mandelbox to exotic realms like Kleinian Groups and Quantum Noise Fields, each fractal is a unique universe with its own physics, aesthetics, and infinite depth.Intuitive. Instant. Immersive. One finger to rotate. Two to pan. Pinch to zoom. Double-tap to reset. That's all you need to navigate infinite complexity. Smart presets automatically optimize each fractal's view, so you start exploring immediately—not configuring settings.Real-Time Mutation Engine Watch fractals morph in real-time as you adjust parameters. Twist space. Fold dimensions. Control iteration depth. Shift through neon color spectrums. Every slider unlocks new visual territories.Cinema-Quality Captures Export your discoveries in breathtaking 4K or 8K resolution—perfect for prints, wallpapers, or simply marveling at mathematical beauty in its purest form.Designed for Explorers, Not Engineers No math degree required. No complicated interfaces. Just pure, unfiltered access to some of the most beautiful mathematical structures in existence.Download now and touch the infinite.
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
Supabase
react-native-reanimated
react-native-gesture-handler
expo-router
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.
