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 Shape Meter camera tool
Have you ever had a question "What is my face shape?"
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.8
9 ratings · Top 50%
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 included17 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 Shape Meter camera tool: 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
Implement improved AI algorithms for better accuracy
Assumption to check: Inaccurate shape detection leading to user frustration
Validate with people who use this workflow before building.
Hypothesis 2
Integrate more social media platforms for sharing results
Assumption to check: Limited sharing options
Validate with people who use this workflow before building.
Hypothesis 3
Provide clearer explanations and benefits for each subscription tier
Assumption to check: Subscription confusion with pricing
Validate with people who use this workflow before building.
Hypothesis 4
Add a feedback mechanism for users to rate accuracy and provide comments
Assumption to check: Lack of user feedback on results
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
Have you ever had a question "What is my face shape?". Here is the answer. FACE SHAPE METER is a simple and easy to use tool for identifying your face shape from your picture. Knowing your face shape can be useful in many different areas. It can be used for makeup and contouring, for finding “the right” haircut/hairstyle or shape of sunglasses that fit you well, or even for a wig or hat that suits you best. More info about the app: http://goo.gl/uooH28 Video Demo: https://youtu.be/Etcooc1ski8 To find out your face shape 3 simple steps needed: 1. take or upload a picture 2. outline your face with a contour as shown on screenshots 3. press the button and see your face shape result Tips for the best result: - use a picture with a neutral facial expression, where your head is directed straight to the camera. Turning your head might affect the final result. - make sure your hairline is visible.
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.
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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.
