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
mooni - mood & moon tracker
Does the moon affect your mood? Millions believe it does
$2.99 · In-app purchases
PRICE
$2.99
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 included15 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for mooni - mood & moon tracker: map the core Health & Fitness 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 in-depth mood analysis and trends over time.
Assumption to check: Limited mood tracking features (e.g., no mood analysis)
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize moods and create personalized icons.
Assumption to check: Lack of customization options for mood logging
Validate with people who use this workflow before building.
Hypothesis 3
Implement social features for sharing moods and challenges with friends.
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 4
Add notifications/reminders to encourage regular mood logging.
Assumption to check: No reminders for logging moods
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
Does the moon affect your mood? Millions believe it does. Science says probably not. Mooni lets you find out for yourself. Check in daily with how you're feeling — mood, energy, and sleep — and Mooni automatically tags each entry with real-time lunar data. Over time, see your personal patterns emerge and compare them against centuries of lunar beliefs. It takes 30 seconds a day. The insights last a lifetime. WHAT YOU TRACK • Mood — from awful to amazing, one tap • Energy level — how much fuel in the tank • Sleep — hours and quality • Optional notes — add context to any day WHAT MOONI SHOWS YOU • Beautiful animated moon showing tonight's exact phase • Moon illumination, distance, zodiac sign, and age • Moonrise and moonset times for your location • Next full moon and new moon dates PATTERNS & INSIGHTS • Your mood trend overlaid with moon illumination • Average mood broken down by all 8 lunar phases • Auto-generated insights: "You feel best during Full Moons..." • Filter by 7, 30, or 90 day ranges MOON CALENDAR • Monthly calendar with mini moon phase icons on every day • Color-coded dots showing your check-in history • Tap any day for full moon details YOUR DATA VS LUNAR BELIEFS • See how your actual mood compares to traditional moon lore • Does the full moon really make you emotional? • Are you calmer during new moons like the ancients claimed? PRIVACY FIRST • 100% offline — no accounts, no servers, no tracking • All data stays on your device • Export your data as CSV anytime Skeptics welcome. Believers welcome. Data doesn't pick sides. Privacy Policy: https://danvilela.com/mooni/privacy-policy Terms of Use: https://danvilela.com/mooni/terms-of-use
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
TypeScript
React Navigation
Redux
React Native Paper
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.
