App Overview

VesselFinder icon

VesselFinder

AstraPaging Ltd. · Navigation

VesselFinder is the world’s most popular and trusted vessel tracking and marine traffic app, delivering real-time information on ship positions and movements worldwide

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
3.2
85 ratings · Below Average

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'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 VesselFinder: 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

Implement a more robust data fetching and state management system.

Assumption to check: Inconsistent real-time data updates

Validate with people who use this workflow before building.

Hypothesis 2

Enhance search capabilities with filters and suggestions.

Assumption to check: Limited search functionality

Validate with people who use this workflow before building.

Hypothesis 3

Streamline the interface for better user experience.

Assumption to check: Cluttered UI with too many options

Validate with people who use this workflow before building.

Hypothesis 4

Add features for downloading maps and tracking offline.

Assumption to check: Poor offline functionality

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

VesselFinder is the world’s most popular and trusted vessel tracking and marine traffic app, delivering real-time information on ship positions and movements worldwide. Using a powerful network of satellites, roaming and terrestrial AIS receivers, VesselFinder provides accurate and up-to-date insight into global maritime activity. Designed for maritime professionals, shipping enthusiasts, and anyone interested in live ship tracking, VesselFinder offers a fast, intuitive, and reliable way to explore vessel traffic across the globe. VesselFinder key features: • Real-time tracking of over 300,000 vessels daily using global AIS data • Vessel movement history with track visualization • Predicted routes and ETAs to next port • Comprehensive vessel particulars, including technical specifications, and cargo capacity information • Contact details for the owning company, manager, ISM manager, and more • Port Calls per vessel, showing arrival times and duration of stay • Port Calls per port, with detailed lists of expected vessels, arrivals, departures, and ships currently in port • My Fleet – save and monitor favorite vessels, synchronized with your VesselFinder account • My Views – save preferred map views for fast and easy navigation • Ship Photos contributed by the VesselFinder user community • Multiple map styles: Simple, Detailed, Dark, Satellite, and Nautical • Weather overlays, including wind, waves, and temperature • See your location feature for instant orientation • Distance measurement tool for route and range estimation Vessel visibility depends on AIS signal availability, with near-shore coverage consistent with the data provided on VesselFinder.com. If a vessel is outside our terrestrial AIS coverage area, its last reported position will be displayed and updated as soon as new data is received. Extended real-time coverage via satellite and roaming AIS sources is available through a subscription. While we make every effort to ensure accuracy, the completeness of the information cannot be guaranteed. Connect with VesselFinder • Facebook: http://www.facebook.com/vesselfinder • Twitter: http://www.twitter.com/vesselfinder

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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
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.