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
Star Rover - Stargazing Guide
Do you love the starry night? Do you want to know everything in the sky? Star Rover is the fantastic planetarium for your iPhone and iPod touch
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
412 ratings · Top 15%
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 Star Rover - Stargazing Guide: 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
Introduce AR features for enhanced stargazing experiences.
Assumption to check: Limited interactive features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Add social sharing and community discussions.
Assumption to check: Lack of community features
Validate with people who use this workflow before building.
Hypothesis 3
Clearer explanations of what users get with each purchase.
Assumption to check: In-app purchase confusion
Validate with people who use this workflow before building.
Hypothesis 4
Implement offline access for sky maps and constellation details.
Assumption to check: Limited offline capabilities
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
Do you love the starry night? Do you want to know everything in the sky? Star Rover is the fantastic planetarium for your iPhone and iPod touch. Just hold up your iPhone and Star Rover will tell you exactly what you are pointing at. Star Rover determines your location automatically. You'll see the stars, moon, planets, constellations in their proper place from your current location. As you move your iPhone, the star map updates in real time. Star Rover makes the virtual sky a gorgeous view. You can see star twinkling, beautiful nebulae, occasional meteor and even sunset glow in the evening. Star Rover is very easy to use. You can simply change the sky view in settings and use Quick Find for everything you want to know in the night sky. Star Rover lets you set your location manually so you can see the sky from any part of the world. It also lets you travel to the future or the past and see the sky on different dates and times. If you are planning for a solar eclipse, this is the app you need. Features - Over 120,000 stars. - All 88 constellations with beautiful artworks. - Planets and their moons with stunning graphics. - Moon phases. - Real images of Messier objects. - Sky objects information. - Realistic Milky Way. - Equatorial and azimuthal grids. - Sky view underneath the horizon. - Visual magnitude adjustment. - Manually time & date setting. - Manually location setting. - Quick Find. - Point and view (iPhone only, compass support required).
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
react-navigation
axios
expo-location
react-native-reanimated
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.
