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 Watchkeeper App builds and runs your boat's watch bill — offline, private, and made for the way crews actually stand watch.
$5.99
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 Watchkeeper App: map the core Productivity workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
The Watchkeeper App builds and runs your boat's watch bill — offline, private, and made for the way crews actually stand watch. Whether you're crossing an ocean or running a delivery, Watchkeeper turns your crew list into a fair, legal, easy-to-read rotation in minutes — then keeps it running through the whole passage. BUILD THE ROTATION YOUR WAY • Proven patterns — circadian (Swedish/Navy), traditional four-on/eight-off, and more — or build your own from scratch. • Two-, three-, four-crew and larger; individuals or teams. • Drag to reshape any watch; edit a single day or the whole cycle. STAND THE WATCH • See who's on now and who's next, in boat time. • Alarms before every watch — Time-Sensitive, so they break through Focus. • Heavy-weather mode shortens watches with one tap and eases back off when it passes. REST THAT HOLDS UP • Automatic STCW rest checks flag a rotation that won't give the crew legal rest. SHARE IT, PRINT IT • Send a shipmate the whole voyage by QR, AirDrop, message, or email — they scan and it's loaded. • Print a one-page watch bill for the bulkhead, with a scan-to-load code. ON THE WATER • Set the ship's clock to your longitude, mark a man-overboard reference and steer back to it, and keep a position log. PRIVATE BY DESIGN Watchkeeper has no account and no servers. Your schedules, vessel, and crew never leave your device — we can't see them. Sharing is peer-to-peer; we never see who you send to. For sailors, by sailors.
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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: Users often find task management apps overwhelming with too many features.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Tasks can be easy to lose track of without proper organization.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Users dislike complex onboarding processes.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Users often want to sync their tasks with calendars.
Validate with people who use this workflow before building.
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.