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
Eclipse Companion
Your guide to the 12 August 2026 and 2 August 2027 Total Solar Eclipses.
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included16 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 Eclipse Companion: map the core Lifestyle 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
Incorporate customizable reminders for upcoming events.
Assumption to check: Lack of user engagement features such as reminders
Validate with people who use this workflow before building.
Hypothesis 2
Add social media sharing and export options.
Assumption to check: Limited sharing options for events and notes
Validate with people who use this workflow before building.
Hypothesis 3
Implement a recommendation engine for events based on user preferences.
Assumption to check: No personalized recommendations
Validate with people who use this workflow before building.
Hypothesis 4
Introduce folders or tags for better note categorization.
Assumption to check: Inadequate note organization
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
Your guide to the 12 August 2026 and 2 August 2027 Total Solar Eclipses. Eclipse Companion helps you choose where to watch, understand what you'll see, and stay ready on eclipse day. Designed for eclipse observers across Europe, North Africa, and the 2027 eclipse path, the app brings together precise local eclipse timings, totality path guidance, location comparison tools, live eclipse simulation, weather context, horizon checks, phase-specific reminders, and a home screen countdown widget in one focused experience. Available in English, Spanish, Portuguese, and Romanian, with more languages planned. Choose your eclipse • Switch between the 12 August 2026 and 2 August 2027 eclipse events • View eclipse timing, visibility, and path details for supported locations • Keep the 2026 eclipse available while preparing for the major 2027 event Plan the best viewing spot • Check whether a city is inside the path of totality • See maximum eclipse time for supported locations • View totality duration where applicable • Compare candidate viewing locations • Discover Best Spot and Great Spot recommendations • Sort cities by duration, altitude, weather, and viewing quality Track the countdown • Add a home screen widget in small, medium, or large size • Always shows your selected city and the time remaining to the eclipse • Updates automatically when you change your city in the app Check the horizon • Use Horizon Check to understand where the eclipse appears in the sky • See live compass direction toward maximum eclipse • Use the altitude gauge and device-level horizon line to judge low-horizon viewing • Review curated Horizon Labels for selected cities and coastal/open-view locations • Get practical guidance for avoiding buildings, trees, ridgelines, and blocked views Check weather context • Hourly cloud-cover overview near key viewing times • Expand for detailed hourly forecast information • Compare weather context across locations • Review historical cloud conditions for selected cities Preview the eclipse before it happens • Real-time animated Sun and Moon alignment • Preview Mode to explore each eclipse phase in advance • Visual markers for key eclipse moments Stay ready • Phase-specific reminders before important eclipse moments • Alerts for first contact, maximum eclipse, totality start, and totality end where applicable • Built-in eye-safety guidance for responsible eclipse viewing
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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
React Navigation
Zustand
React Native Gesture Handler
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.
