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
TennisCount
TennisCount - Professional Tennis Scoreboard for Apple Watch
$1.99
PRICE
$1.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 TennisCount: 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 and match history features.
Assumption to check: Lack of user engagement features
Validate with people who use this workflow before building.
Hypothesis 2
Provide detailed graphs and trends over time.
Assumption to check: Limited statistics visualization
Validate with people who use this workflow before building.
Hypothesis 3
Add notifications for match days or reminders to log matches.
Assumption to check: No alerts or reminders
Validate with people who use this workflow before building.
Hypothesis 4
Enhance UI with modern styling and user-friendly navigation.
Assumption to check: Basic UI design
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
TennisCount - Professional Tennis Scoreboard for Apple Watch Keep perfect track of your tennis matches with TennisCount, the most elegant and intuitive scoreboard designed exclusively for Apple Watch. KEY FEATURES: OFFICIAL SCORING • Traditional tennis scoring (love, 15, 30, 40, deuce, advantage) • Simplified mode for quick recreational matches (score games directly) • Configurable match formats (1, 3, or 5 sets) • Tiebreak support (7, 10, or 12 points) • Automatic server tracking and rotation SHARED MATCHES Start a Shared Match and your opponent — and anyone watching — sees the exact same score on their Apple Watch and iPhone, the moment it happens. No refreshing. No asking "what's the score?" Just tennis. • Everyone stays in sync — automatically • Score updates reach all guests in under 2 seconds, even with the app in the background. SMART INTERACTIONS • Tap player zones to score points • Swipe left to undo mistakes • Double Tap gesture support (Apple Watch Series 9+, Ultra 2+) - Score for current server - Wrist gesture mode (watch facing you = Player 1, watch facing away = Player 2) • Voice score announcements in multiple languages BEAUTIFUL DESIGN • Liquid Glass interface following Apple's latest design • 3 court themes: Grass, Clay, Hard Court • Responsive layout optimized for all Apple Watch sizes • Minimalist, distraction-free experience STATISTICS & HISTORY • Complete match statistics • Detailed set breakdown • Match history with date and time • Share results via Messages, Mail, or social media MULTILINGUAL SUPPORT • English, Portuguese, Spanish, French, Italian, German • Russian, Chinese, Hindi, Bengali, Japanese • Voice announcements in your language ACCESSIBILITY • VoiceOver compatible • Large, clear typography • High contrast design • Haptic feedback for confirmations PRIVACY FIRST • No data collection • Works 100% offline • No account required • All data stored locally on your watch PERFECT FOR: • Amateur and professional players • Tennis coaches and instructors • Recreational players • Tennis tournaments and leagues • Practice sessions WHY CHOOSE TENNISCOUNT? Unlike other scoreboard apps, TennisCount was designed from the ground up specifically for Apple Watch. Every feature, every interaction, every animation was crafted to take advantage of the unique capabilities of your wrist. No need to pull out your phone. No complicated menus. Just pure tennis scoring, elegantly executed. GETTING STARTED: 1. Open TennisCount on your Apple Watch 2. Enter player names (optional) 3. Choose match format and court type 4. Start playing! Tap to score, swipe to undo That's it. TennisCount handles all the complex tennis rules automatically. ALWAYS IMPROVING: We're constantly adding new features based on user feedback. Future updates will include: • Advanced statistics (aces, double faults, break points) • Match timer • Support for doubles matches • Surprises FEEDBACK: We'd love to hear from you! If you enjoy TennisCount, please leave a review. If you have suggestions or encounter issues, contact us at [email protected]. Download TennisCount today and elevate your tennis experience! Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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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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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.
