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
Hairstyle Magic Mirror
Hairstyle Magic Mirror Change your look, allows you to experiment with many new and fascinating hairstyles and lots of different color variations
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.9
41 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 included18 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 Hairstyle Magic Mirror: 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
Add more diverse and trendy hairstyles.
Assumption to check: Limited hairstyle options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the purchasing process and make premium features clearer.
Assumption to check: In-app purchases may be confusing for users
Validate with people who use this workflow before building.
Hypothesis 3
Integrate social media sharing for user-generated content.
Assumption to check: Lack of social sharing options
Validate with people who use this workflow before building.
Hypothesis 4
Provide higher quality images for hairstyles.
Assumption to check: Low resolution images may impact user experience
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
Hairstyle Magic Mirror Change your look, allows you to experiment with many new and fascinating hairstyles and lots of different color variations. Take a picture to your friends or your girl and have fun to change their look. Available features: - Simple and clear interface - Lots of hairstyles for both men and women - Lots of ready color options and possibility to create your own favorite color - New function Meches supported by all hairstyles - 4 characters already ready to use (2 male and 2 female) - Possibility to take a photo or choose one from the library - Rotation tool for imported photos - Sophisticated facial detection system - Possibility to improve the final result by dragging the anchor points of the hair - 20 memory cells to experiment with different hairstyles and different colors at once - Save the results on phone memory as pictures - Share your photos on facebook or by email New hairstyles and features will come with future updates.
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
Zustand
Axios
React Navigation
Expo Image Picker
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.
