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
Moon Phase Today
Moon Phase Today – Moon Today and Lunar Calendar
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
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 included14 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 Moon Phase Today: map the core Weather 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 animated moon phase transitions or graphics.
Assumption to check: Limited visual representation of moon phases
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize alerts for different moon phases.
Assumption to check: Lack of personalization options
Validate with people who use this workflow before building.
Hypothesis 3
Integrate GPS for accurate moon rise/set times.
Assumption to check: Absence of location-based features
Validate with people who use this workflow before building.
Hypothesis 4
Include informational sections about moon phases and their significance.
Assumption to check: No educational content on moon phases
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
Moon Phase Today – Moon Today and Lunar Calendar Check the moon phase today instantly with a fast and accurate lunar calendar. See moon today, track all moon phases, and view upcoming full moon and new moon dates using a complete moon calendar. With Moon Phase Today you can quickly discover the moon phase today, check the illumination percentage, lunar age, and explore past and future moon phases directly in the lunar calendar. Key features: - See the moon phase today in real time - Check moon today quickly and accurately - Access the complete lunar calendar - View upcoming full moon and new moon dates - Track all moon phases throughout the month - View past and future moon phases easily - Check moon illumination and lunar age - Clean, fast, and modern interface Moon Phase Today is perfect for anyone who wants to track moon today, follow the moon phase today, and use a reliable lunar calendar to know when the next full moon or new moon will happen. Download now and track the moon phase today using a complete and accurate lunar calendar.
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
Supabase
React Navigation
React Native Paper
react-native-svg
BUILD KIT DIFFICULTY
Starter
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.
