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
Golf Plus : Swing Analyzer
"What gets measured gets managed.
$12.99
PRICE
$12.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.9
20 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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Combine features and design from your favorite apps.
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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 included
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 Golf Plus : Swing Analyzer: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
"What gets measured gets managed. And what doesn't get measured may get mismanaged" The perfect golf swing is not created only by repetitive practice. To precisely control the swing, you need to quantify and analyze the various elements of the golf swing. Golf Plus, the best swing analyzer application for Apple Watch, will be a great coach for your golf life. # Every shot is recored and analyzed right on your wrist # Review all the session and shots on your iPhone # No extra hardware to buy. All you need is your Apple watch. # Golf Plus can replace swing sensor devices priced more than $150 Golf Plus : Shot Tracker & Swing Analyzer Features - Simple UI & Quick start - Swing motions are captured by Apple Watch Integrated sensors - 3D Visualized swing trajectories are provided - You can check various figures (speed, acceleration, tempo, face angle) - Swing motions are captured by Apple Watch Integrated sensors - Energy efficient for battery life (Optimized & accurate algorithm) - Everything is synced automatically with your iPhone - Check your step counts & calories during the sessions (integrated with the HealthKit)
Written user reviews are not shown here. Check current App Store reviews >
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 AI-driven insights and recommendations for improvement.
Assumption to check: Limited functionality for advanced swing analysis
Validate with people who use this workflow before building.
Hypothesis 2
Optimize video processing and playback for smoother performance.
Assumption to check: Poor performance with video playback on older devices
Validate with people who use this workflow before building.
Hypothesis 3
Add social sharing features to compete with other fitness apps.
Assumption to check: Lack of social features for sharing achievements
Validate with people who use this workflow before building.
Hypothesis 4
Offer a freemium model with basic features free and premium features available for a subscription.
Assumption to check: High price point compared to competitors
Validate with people who use this workflow before building.
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
react-navigation
expo-camera
react-native-chart-kit
expo-video
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
