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
LapTime App
Description:
$5.99 · In-app purchases
PRICE
$5.99
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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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 LapTime App: map the core Travel 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
Focus on adding comprehensive itinerary management and social features.
Assumption to check: Poor user reviews due to lack of features.
Validate with people who use this workflow before building.
Hypothesis 2
Implement an intuitive interface for managing multiple trips.
Assumption to check: Difficulty in navigating multiple trips.
Validate with people who use this workflow before building.
Hypothesis 3
Add in-app messaging and collaboration tools.
Assumption to check: Limited communication features between users.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a freemium model with basic features accessible for free.
Assumption to check: High price point with no free trial.
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
Description: LapTime turns your Apple Watch into a fun, interactive playground for young children. With four engaging activities designed for tiny fingers, kids stay entertained while building essential skills — no iPhone required. COLOR SPLASH PAD Tap and drag to paint the screen with vibrant splashes of color. Every touch creates a burst of color with satisfying haptic feedback. Perfect for creative exploration and sensory play. SHAPE DROP Drag triangles, stars, and squares to the target zone. Each successful drop triggers a celebration with particles and haptics. Builds hand-eye coordination and shape recognition. BUBBLE POP Colorful bubbles float across the screen — tap them before they drift away! A simple, endlessly fun activity that sharpens reaction time and keeps little ones engaged. COLOR MEMORY A Simon-style memory challenge with colorful tiles. Watch the sequence, then repeat it. Each round adds a new step, progressively building memory and pattern recognition skills. DESIGNED FOR PARENTS - Auto-rotate cycles through activities on a timer you control (1-10 minutes) - Triple-tap to access Parent Controls anytime - Navigate between games with the Digital Crown - No ads, no in-app purchases
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
Zustand
React Navigation
React Native Reanimated
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.
