App Overview

U.S. Inland Navigational Rules icon

U.S. Inland Navigational Rules

The Other Hat · Navigation

Essential Information for All Boat Users.

$2.99 · In-app purchases

PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.3
6 ratings · Top 30%

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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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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> SELECT BUILD PLATFORM:

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

// RORK SYSTEM PROMPT
Rork plan preview for U.S. Inland Navigational Rules: map the core Navigation 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 a feature for offline access to all content.

Assumption to check: Limited offline access to rules and glossary.

Validate with people who use this workflow before building.

Hypothesis 2

Implement clearer navigation paths and better categorization.

Assumption to check: Navigation can be confusing between rules and glossary.

Validate with people who use this workflow before building.

Hypothesis 3

Add a feedback system for users to rate and comment on rules.

Assumption to check: No option for user feedback or ratings on rules.

Validate with people who use this workflow before building.

Hypothesis 4

Incorporate images or diagrams for better understanding.

Assumption to check: Lack of visual aids or illustrations for rules.

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

Essential Information for All Boat Users. Now includes Search function, Quick Get Location (your current latitude and longitude) with save and export, and Text Size/Reading mode. Complete Inland Navigation Rules for all U.S. inland waters and the Great Lakes. With 100+ specially produced explanatory illustrations and captions. For all boaters. Plus FREE bonus emergency procedures section. ************ FEATURES and BENEFITS ******************* - For reference, learning & revision - Over 100 custom made graphics for quick reference and easy learning - Researched and produced by nautical and marine experts for accuracy - Positively evaluated by professionals for reliability The complete Inland Navigation Rules for the United States including Parts A, B, C, D and E, plus Annexes, Interpretative Rules and other associated Navigation Regulations are all included in this app. See details below. A bonus illustrated section includes emergency procedures for boaters to follow when in difficulty. Anyone who is responsible for a vessel, from the smallest dinghy to an ocean going freighter, must be able to recognize other vessels around them by day or night, whatever the visibility. They need to be able to quickly interpret what other vessels are doing, who has right of way and what action they should take to prevent a possible collision. This is not always easy, especially along crowded rivers, narrow channels, in harbors or in poor visibility. NAVIGATION RULES INLAND includes the fully illustrated Rules of the Road - great for quick reference and easy learning. • Steering & Sailing Rules [ILLUSTRATED] • Lights & Shapes [ILLUSTRATED] • Sound & Light Signals [ILLUSTRATED] NAVIGATION RULES INLAND also includes the complete detailed rules as follows: * Exemptions * Annex I - Positioning and Technical Details of Lights and Shapes * Annex II - Additional Signals for Fishing Vessels Fishing in Close Proximity * Annex III - Technical Details of Sound Appliances * Annex IV - Distress Signals [ILLUSTRATED] * Annex V - Pilot Signals * Interpretive Rules * COLREGS DEMARCATION LINES - detailed information of the lines of jurisdiction that separate the Inland and International Rules, as indicated on National Ocean Service navigation charts * Alternative Compliance * Waters upon which Inland Rules apply * Vessel Bridge to Bridge Radiotelephone Regulations * Vessel Traffic Services (VTS) Call Signs, Designated Frequencies, and Monitoring Areas * Penalty Provisions ************* FREE Bonus Content from "Safe Skipper" ***************************** Safety Afloat Tips & Advice on Emergency Procedures for all Sailors and Leisure Boaters. * Safety information & practical tips * Specially created custom graphics: illustrations, photos & diagrams * Advice on emergency procedures * Stay safe and prevent accidents happening * Written & illustrated by a qualified & experienced yachtsman Includes information on: * Abandoning ship * Dismasting * Distress signals * Engine failure * Fire fighting * Getting a tow * Helicopter rescue * Holed hull * MAYDAY procedures * Medical emergency * SAR signals ***************************************** Customer feedback for Safe Skipper: "Highly recommend this App, get it on your Phone or Tablet today" "This app is full of really useful info for anyone going to sea (or inland waterways...). It's presented really well, and has some good graphics. Can't believe just how much they've packed in. Recommended." "A well written and detailed app for yachts & inland craft also quite useful for ocean going vessels - well done." ***************************************** Special thanks to Captain Richard J. Rodriguez, U.S. Coast Guard licensed Master and Director of Operations at Zenith Maritime for his helpful advice and recommendations.

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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.

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BUILD KIT DIFFICULTY
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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.