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.
the complete navigation rules study system
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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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Neptune: Navigation Rules: map the core Education workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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
Assumption to check: Limited interactive features for engagement
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No offline access to rules
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of personalized learning paths
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Few languages available
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
the complete navigation rules study system whether you're preparing for your uscg rules of the road exam or maintaining proficiency as an experienced mariner, neptune delivers everything you need to master colregs with confidence. ai-powered guide ask neptune: chat with an intelligent assistant trained specifically on the uscg navigation rules. instant explanations: tap "explain solution" on any question to get a detailed, plain-english breakdown of why an answer is correct. context-aware help: the ai understands the specific rules and scenarios you are studying, providing targeted clarification for complex legal text. real-world insights: over 500 maritime court documents to provide context to how the rules are adjudicated comprehensive question bank uscg navigation rules question pool questions for both inland and international waters each question linked to specific rule citations user-customizable citations - add your own rule references intelligent study modes study mode - browse questions by rule with instant feedback - track reviewed vs. unreviewed questions per rule - visual progress bars showing rule coverage - flag difficult questions for later review test mode - configurable question counts (10, 25, 50, 72, custom) - filter by category: inland only, international only, or both - filter by word, such as excluding all western river questions - optional timer with customizable duration - immediate or end-of-test feedback options - detailed score breakdowns and review - save testing presets for easy reuse daily challenge - fresh daily questions to maintain consistency - timed challenges with performance tracking - perfect score tracking and streaks advanced progress tracking easily see your strongest and weakest rules with "confidence scores" per question based on test performance rule proficiency statistics showing mastery by rule coverage tracking - see exactly which rules need attention visual confidence indicators (low/medium/high) detailed attempt history for every question gamification & motivation streak tracking - maintain daily study habits achievement system - unlock milestones as you progress daily activity logging - visualize your study consistency weekly and monthly progress summaries complete rule reference full navigation rules handbook with in-text supported highlighting rules organized by number with clear categorization interactive diagrams with zoom and pan direct links from questions to relevant rules searchable rule content and questions upload your own notes and comments for each rule powerful search search across questions and rules simultaneously find questions by keyword, rule number, or content quick navigation to any rule or question cloud sync (optional) secure account creation with apple sign-in sync progress across all your devices never lose your study progress works offline - syncs when connected user-friendly & accessible dark mode: fully optimized dark theme for comfortable night study sessions. haptic feedback: tactile responses for enhanced interaction. question flagging: bookmark tricky scenarios for focused review. share capabilities: export questions as images for study groups or get opinions from senior mariners. citation management: view, add, or remove rule citations to match your exam focus.
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Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.