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
FencingLab
FencingLab — AI Fencing Coach
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 ratings · Top 5%
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 included15 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 FencingLab: 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 social sharing or community features.
Assumption to check: Limited user engagement features
Validate with people who use this workflow before building.
Hypothesis 2
Offer customizable training plans based on user goals.
Assumption to check: Lack of personalized training plans
Validate with people who use this workflow before building.
Hypothesis 3
Allow syncing with fitness trackers for better data.
Assumption to check: No integration with wearable devices
Validate with people who use this workflow before building.
Hypothesis 4
Provide deeper analytics on performance over time.
Assumption to check: Minimal analytics insights
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
FencingLab — AI Fencing Coach Transform your fencing with AI-powered video analysis. Record or upload your bouts, and FencingLab breaks down your technique, tracks your progress over time, and delivers personalized training recommendations. What FencingLab does: • Analyzes fencing videos using advanced AI to identify actions, timing, and technique • Tracks improvement across sessions with progress charts and skill scores • Provides tactical matchup analysis against specific opponents • Supports Foil, Épée, and Sabre • Works for athletes and coaches managing multiple fencer profiles AI Analysis Options: • Gemini AI — cloud-based analysis for detailed, high-quality feedback • Local AI — on-server processing with no third-party data sharing Subscription: FencingLab offers auto-renewable subscriptions that unlock Gemini AI analysis. A 7-day free trial with 5 complimentary credits is included at sign-up. Subscriptions are billed through your Apple ID. You can manage or cancel your subscription at any time in App Store Settings. Privacy: When Gemini AI is selected, your video is sent to Google's servers for analysis. Local AI keeps all processing on our servers with no third-party sharing. Your privacy choices are always in your control in the app settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
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Expo
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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.
