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
Near-Earth Asteroids Tracker
On average, Earth is visited by a small asteroid (5-20 meters in diameter) every month!
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.0
1 ratings · Below Average
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.
Build your own version
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 Near-Earth Asteroids Tracker: map the core Weather 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
Provide more in-depth information and analysis on each asteroid.
Assumption to check: Limited details on asteroids
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the design for better user experience.
Assumption to check: User interface cluttered
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize alert preferences.
Assumption to check: No customization options for alerts
Validate with people who use this workflow before building.
Hypothesis 4
Ensure real-time updates for alerts and notifications.
Assumption to check: Inconsistent notification updates
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
On average, Earth is visited by a small asteroid (5-20 meters in diameter) every month! Explore the Near-Earth Objects (NEOs), Potentially Hazardous Asteroids (PHAs), and fireball events on worldwide map. - Interactive Fireball Map displaying reported meteor and bolide impact events with energy visualization - Detailed information about asteroids and their orbits - Impact Risk data section featuring Earth Impact Monitoring collision assessment data - Search through NASA's extensive asteroid database - Track close approaches to Earth and other celestial bodies - Visual distance indicators with dynamic color coding - Hazard percentage calculation based on the Palermo technical impact hazard scale - iPad optimization for a seamless experience across all devices Perfect for: - Astronomy enthusiasts - Space science students - Anyone curious about near-Earth objects and meteor events #AsteroidTracker #NearEarthObjects #SpaceScience #FireballTracking
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
Zustand
Supabase
react-native-reanimated
expo-router
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.
