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
ISS Real-Time Tracker 3D
Track and predict flyovers of the International Space Station, Tiangong (Chinese Space Station), and Hubble Space Telescope in stunning, real-time 3D
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
1,163 ratings · Top 5%
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 included18 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 ISS Real-Time Tracker 3D: map the core Reference 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 more efficient data fetch strategy for live updates.
Assumption to check: Limited real-time updates; users experience delays in tracking.
Validate with people who use this workflow before building.
Hypothesis 2
Clearly outline premium features and benefits in the app.
Assumption to check: In-app purchases can be confusing; unclear benefits.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify navigation flow and enhance usability.
Assumption to check: Complex navigation between screens can confuse users.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce customizable settings for notifications and display preferences.
Assumption to check: Lack of user customization options.
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
Track and predict flyovers of the International Space Station, Tiangong (Chinese Space Station), and Hubble Space Telescope in stunning, real-time 3D. Immerse yourself in a photorealistic globe of Earth, showcasing orbital paths and live positions for the three largest objects in low Earth orbit—optimized for iPhone, Apple Watch, and Macs with Apple silicon. Plan up to 30 days ahead with precise, location-based pass predictions, complete with a custom 0–4 star rating system that highlights the most visible flyovers. Tap to add passes to your calendar and never miss a moment. Key Features: • Real-Time Tracking: Follow the ISS, Tiangong, and Hubble with interactive 3D visuals and high-frame-rate animations. • Flyover Ratings: Instantly spot the best viewing opportunities with our intuitive star rating system. • 3D SkyDome View: See the arc of each pass from your location with a rotatable sky overlay. • Dynamic Earth Globe: View live positions, orbits, the Earth’s axis, solar reflections, subsolar point, and day/night transitions. • Crew Info: Meet the current crew, read bios, view mission stats, and connect via X (Twitter). • Alerts & Scheduling: Get automatic reminders 1 hour and 15 minutes before passes—just tap to schedule. • Live HD Earth Video: Stream from the ISS’s Harmony node in real time. • Map Customization: Choose from multiple map marker styles and zoom options. • Ambient Music: Enhance your stargazing experience with optional background music. • Info Overlay: View current satellite position, altitude, and speed at a glance. • Companion Apple Watch App: Includes Lock Screen and Home Screen widgets for quick access. • All Settings Saved: Preferences like zoom level and map style are saved for your convenience. I created this app to bring the awe of space exploration right to your fingertips. Join me on this journey—and never miss a pass again.
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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
React Native
Expo
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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.
