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
SkySafari
SkySafari 8 is a powerful planetarium that fits in your pocket, puts the universe at your fingertips, and is incredibly easy to use!
$6.99 · In-app purchases
PRICE
$6.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
17,878 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 included19 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 SkySafari: 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
Provide extensive, community-driven content and user contributions.
Assumption to check: Limited content for certain celestial objects
Validate with people who use this workflow before building.
Hypothesis 2
Offer a more affordable pricing model with tiered features.
Assumption to check: High subscription costs compared to alternatives
Validate with people who use this workflow before building.
Hypothesis 3
Improve user onboarding with tutorials for AR functionality.
Assumption to check: Difficulty in navigating AR features
Validate with people who use this workflow before building.
Hypothesis 4
Implement real-time updates and notifications for events.
Assumption to check: Slow updates for celestial events
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
SkySafari 8 is a powerful planetarium that fits in your pocket, puts the universe at your fingertips, and is incredibly easy to use! Simply hold your device to the sky and quickly locate comets, planets, constellations, satellites, and millions of stars and deep sky objects. Whether you are a beginner or a longtime astronomy enthusiast, SkySafari 8 is your perfect stargazing companion, packed with interactive information, rich graphics, and a beautifully refined interface. What’s New in Version 8 + New Theme - A new look of the app with a fresh visual palette. + Image Gallery - Explore the universe through astrophotography. Import images directly from AstroBin. + Sky Tonight - Jump to the new Tonight section to see what’s visible in your sky right now. Expanded information has been designed to help plan your night and includes Moon & Sun info, calendar curations, and the best positioned deep sky and solar system objects. If you're new to SkySafari 8, here’s what you can do: + Point & Identify - Hold your device to the sky and instantly identify stars, constellations, planets, satellites, and more. The chart updates automatically with your movements. + OneSky - See what other users are observing in real-time. This feature highlights objects in the sky chart and indicates how many users are looking at them. + Orbit Mode - Lift off from Earth and travel to the planets, moons, and stars. + Guided Audio Tours - Listen to more than four hours of audio narration to learn the history, mythology, and science of the heavens. + Pronunciation Guide - Learn how to correctly pronounce the names of hundreds of celestial objects, from stars to constellations and planets. + Simulate the Sky - See an eclipse in the past or future! Simulate the night sky from anywhere on Earth many years backward or forward in time. + Night Vision - Preserve your eyesight after dark. SkySafari Premium Subscription Unlock amazing features with the optional Premium Subscription, including: + Massive Database - Access a massive deep sky database. + Custom Image Import - Upload and manage your own astrophotography images in the Image Gallery and show them in the sky chart. + Enhanced Tools - Access curated news, events, connected stargazing features, a light pollution map, and more. For telescope control and even more advanced features, check out SkySafari 8 Plus and SkySafari 8 Pro! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.livesky.com/privacy.html
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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
Supabase
Zustand
React Navigation
expo-location
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.
