App Overview

Neptune: Navigation Rules icon

Neptune: Navigation Rules

Brice Brown · Education

the complete navigation rules study system

$4.99 · In-app purchases

PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
6 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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A product spec, screen plans, and build steps for your coding agent.

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What's included17 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

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.

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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Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
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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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

Include gamification elements like points and badges for completing quizzes.

Assumption to check: Limited interactive features for engagement

Validate with people who use this workflow before building.

Hypothesis 2

Implement offline downloads for rules and quizzes.

Assumption to check: No offline access to rules

Validate with people who use this workflow before building.

Hypothesis 3

Offer customized learning based on user progress and interests.

Assumption to check: Lack of personalized learning paths

Validate with people who use this workflow before building.

Hypothesis 4

Add multi-language support to reach a wider audience.

Assumption to check: Few languages available

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

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.

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.

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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.