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.
VesselFinder is the most popular vessel tracking app, providing real-time data on the positions and movements of vessels, utilising a large network of terrestrial AIS receivers.
$9.99 · In-app purchases
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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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 VesselFinder Pro: map the core Business 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: App has a low rating, indicating poor user experience
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited search functionality and filters
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchases are confusing
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: UI is outdated and non-responsive
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.
VesselFinder is the most popular vessel tracking app, providing real-time data on the positions and movements of vessels, utilising a large network of terrestrial AIS receivers. VesselFinder Pro features include: - No Ads - Port Calls - arrival and departure information for recently visited ports - Real time tracking of over 200,000 ships every day - Ship search by Name, IMO number or MMSI number - Ship movement history - follow the track of vessels for the past 7 days - Ship details - name, flag, type, IMO, MMSI, destination, ETA, draught, course, speed, gross tonnage, year of built, size - My Fleet - add your favorite vessels to "My Fleet" list. It is synced with VesselFinder.com, so any change of vessels in My Fleet list will reflect on either the mobile App or the website. - Filter vessels on map according to their type - Ship photos contributed by VesselFinder users - Simple, Detailed, Dark and Satellite maps - Weather layers (temperature, wind, waves) - Distance Measure tool - See Your Location feature Coverage - near-shore coverage, same as the web-based application VesselFinder.com and the Free version of VesselFinder available at https://itunes.apple.com/us/app/vesselfinder-free/id918080862?mt=8 IMPORTANT: If you experience any problem with the App, please fill out this form to contact us http://www.vesselfinder.com/contact instead of writing a review here. We will do our best to solve it. Thanks! Visibility of vessels in the App depends on AIS signal availability. If a particular vessel is out of our AIS coverage zone, VesselFinder displays her last reported position and updates it as soon as the vessel comes into range. Completeness and accuracy of the information provided cannot be guaranteed. Connect with VesselFinder - on Facebook: http://www.facebook.com/vesselfinder - on Twitter http://www.twitter.com/vesselfinder For any help and support, please visit the VesselFinder forum: http://forum.vesselfinder.com/forum/6-vesselfinder/
Written user reviews are not shown here. Check current App Store reviews >
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.