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
Facefitness - face exercise
Face Fitness: Transform Your Appearance Naturally
$0.99 · In-app purchases
PRICE
$0.99
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.
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's included14 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 Facefitness - face exercise: 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
Introduce community challenges and share progress on social media.
Assumption to check: Lack of user engagement features (e.g., social sharing)
Validate with people who use this workflow before building.
Hypothesis 2
Offer a wider range of exercises and routines.
Assumption to check: Limited exercise variety
Validate with people who use this workflow before building.
Hypothesis 3
Clarify subscription benefits and make premium features more appealing.
Assumption to check: Monetization confusion
Validate with people who use this workflow before building.
Hypothesis 4
Implement AI-driven recommendations based on user progress and preferences.
Assumption to check: No personalized recommendations
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
Face Fitness: Transform Your Appearance Naturally Discover the power of facial gymnastics with our comprehensive Face Fitness app. Achieve a youthful, radiant look without surgeries or expensive treatments. Key Features: Targeted Lessons: Focus on specific areas like eyes, lips, nose, forehead, and chin. Illustrative Guides: Each exercise comes with detailed illustrations and descriptions. Structured Workouts: Follow step-by-step workout modes with built-in timers. Stay Consistent: Set training reminders and track your progress on the calendar. Invest just 15 minutes daily to rejuvenate your face and neck. Suitable for all ages and genders, our exercises help reduce wrinkles, enhance facial features, and address specific facial concerns. Experience Visible Changes: 1 Week: Reduce wrinkles, diminish swelling, lift your forehead, and brighten your eyes. 1 Month: Alter facial habits, improve skin health, bid goodbye to the double chin, and soften facial features. 6 Months: Define cheekbones and chin, enlarge eyes, refine the nose, and reverse age-related changes. Join thousands who've transformed their faces. Download now and start your journey to a naturally beautiful you!
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
axios
react-native-reanimated
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.
