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
Cosmic-Watch
For thousands of years, humans have gazed at the sky, deciphering the passage of time and experiencing a cosmic connection with the heavens
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
612 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/
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 Cosmic-Watch: map the core Education 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
Enhance interactivity with more simulation options and gamification.
Assumption to check: Limited interactive features compared to other educational tools
Validate with people who use this workflow before building.
Hypothesis 2
Implement guided tutorials and onboarding.
Assumption to check: Learning curve for new users unfamiliar with astronomy
Validate with people who use this workflow before building.
Hypothesis 3
Provide clear descriptions of additional content benefits.
Assumption to check: In-app purchases can be unclear regarding value
Validate with people who use this workflow before building.
Hypothesis 4
Optimize 3D models and improve loading times.
Assumption to check: Occasional performance issues with 3D rendering
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
For thousands of years, humans have gazed at the sky, deciphering the passage of time and experiencing a cosmic connection with the heavens. The Cosmic Watch aims to revive this ancient bond and offers the essential tools for navigating the sky. Key Features: • Three perspectives: sky, Earth, and solar system • Unique app showcasing the celestial sphere concept • Planetarium with star maps, constellations, and events • Augmented reality for interactive sky exploration • High-resolution Earth globe with day and night cycles • Interactive astronomical and world clocks • Visualized natal charts: western, Vedic, true sidereal • Comprehensive representation of retrogrades • Geocentric and Heliocentric solar system views • Celestial navigation guides for sky orientation • Educational layers for insights into celestial phenomena Use it as your daily clock to effortlessly observe planets and celestial events. Stay connected to the cosmos, navigate the night sky, and access instant time information for any place in the world. Discover constellations, stars, and planets in augmented reality, deepening your knowledge and appreciation of the celestial realm. Cosmic Watch demystifies complex celestial motions and enhances your understanding of their connection to daily life. Stay in sync with the cosmos through notifications for important astronomical events. It provides a fresh perspective on astrology, allowing you to witness retrograde motion and discover your true zodiac constellation. Experience the awe-inspiring "overview effect," reminding you of Earth's beauty and interconnectedness. Cosmic Watch seamlessly blends education, entertainment, and visual delight in a user-friendly interface. Embracing the history of timekeeping, astrology, and astronomy, it provides a harmonious blend of ancient wisdom and modern technology. Recognized with awards and accolades, including the WEBBY AWARD for Best Educational App, Cosmic Watch is a must-have for nature lovers, astronomers, and anyone fascinated by the wonders of the celestial vault. Embark on a cosmic journey and let the celestial rhythm become part of your daily life with Cosmic Watch. Not a widget, not a smart watch app. The app offers additional Tools as in App Purchases. Feedback or assistance: [email protected]. User guide: https://cosmic-watch.com/user-guide/ Terms of Service: https://cosmic-watch.com/termsOfService/ The celestial voyage awaits—embrace the cosmic rhythm with Cosmic Watch!
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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
three.js
@react-navigation/native
react-native-async-storage
expo-gl
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.
