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
Coach Video Analyzer
Perfect Your Movement – Frame by Frame
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 1.0
1 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.
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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 included16 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 Coach Video Analyzer: map the core Sports 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
Incorporate more editing tools for better analysis
Assumption to check: Limited video editing capabilities
Validate with people who use this workflow before building.
Hypothesis 2
Create a more polished and user-friendly design
Assumption to check: Poor user interface
Validate with people who use this workflow before building.
Hypothesis 3
Add sharing features to enhance user engagement
Assumption to check: Lack of social features
Validate with people who use this workflow before building.
Hypothesis 4
Offer a more competitive pricing model or add value with features
Assumption to check: High price point for premium features
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
Perfect Your Movement – Frame by Frame This app is your personal movement analyst for sports and training. Avoid incorrect movements, optimize your technique, and improve your performance through detailed video analysis. Precise Slow Motion Analysis Play your videos in slow motion or analyze them frame by frame with a simple tap. Use zoom and rotation gestures to examine every movement from any angle. AI-Powered Body Pose Detection Leverage Apple's advanced Vision technology to automatically detect body poses and visualize your movements. Perfect for athletes, coaches, and physiotherapists. (Note: This feature may be slower on older devices) Key Features: - Record videos directly in the app - Slow motion and normal speed playback - Frame-by-frame analysis with tap gesture - Zoom and rotation for detailed viewing - AI-powered body pose detection - Person segmentation - Endless loop for movement sequences - Stroboscopic view (shows overlaid movement progression) - Freehand drawing tool for annotations - Grid overlay for alignment - Import from Photos, Files App, or Camera - Drag & drop support (iPad) - Share function Ideal for: Golf, tennis, fitness, dance, martial arts, track and field, and any other sport where technique matters.
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/native
expo-av
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.
