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
Face Harmony by Clavicular
Unlock your best look with Face Harmony, a face analysis app designed to help you understand your facial balance, proportions, and grooming potential.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 2.0
84 ratings · Below Average
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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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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 Face Harmony by Clavicular: 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
Expand exercise database and introduce new routines regularly.
Assumption to check: Limited exercise variety compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Enhance UI with animations and better visual elements.
Assumption to check: User interface is not engaging
Validate with people who use this workflow before building.
Hypothesis 3
Implement an algorithm to suggest exercises based on user preferences.
Assumption to check: Lack of personalized recommendations
Validate with people who use this workflow before building.
Hypothesis 4
Improve transparency around subscription features and benefits.
Assumption to check: Poor reviews regarding subscription clarity
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
Unlock your best look with Face Harmony, a face analysis app designed to help you understand your facial balance, proportions, and grooming potential. Harmony uses camera-based face scanning, biometric-style face mapping, and personalized insights to give you a clear breakdown of your facial harmony. Features: Face scan with guided positioning Facial metric breakdown Symmetry analysis Eye area insights Jawline and midface scoring Proportion analysis Canthal tilt, eye spacing, and eye symmetry sub-metrics Side profile inspection Personalized improvement suggestions Progress and scan history Face Harmony helps you identify what is already working, what can be improved, and how small changes in grooming, hairstyle, posture, skincare, and photos can improve your appearance. Whether you want to look better in photos, improve your dating profile, refine your grooming, or track your glow-up, Harmony gives you a clean and practical way to start. Upgrade to Harmony Pro to unlock: Full facial report Advanced sub-metrics Detailed improvement plan Side profile scan Scan history Face Harmony is for appearance, grooming, and self-improvement guidance only. It does not provide medical advice, diagnosis, or treatment recommendations. Scan features are paid and there is no free tier to access Face Harmony Standard Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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-reanimated
react-native-svg
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.
