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.
Will it be Champagne Sailing or are you boarding the Vomit Comet? SeaSick tells you — before you leave the dock.
$3.99 · 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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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 SeaSick - Will I Puke?: map the core Weather 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: Users often find weather apps inaccurate or slow to update.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of engaging user experience in standard weather apps.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Difficulties in accessing location permissions can frustrate users.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited customization options for users.
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.
Will it be Champagne Sailing or are you boarding the Vomit Comet? SeaSick tells you — before you leave the dock. SeaSick is the only app that combines real physics and scientific seasickness research with real-time weather data. Version 3.0 goes beyond prediction: measure actual boat motion, keep a complete weather logbook, and read proven prevention tips — all in one app. ---------------- COMFORT PREDICTION Enter wave height, period, and boat details — or tap the map and let SeaSick fetch live data. You'll get a Comfort Score from 0 to 10, based on research by O'Hanlon & McCauley and ISO standards for human comfort. • Manual input or real-time data via the forecast map • Monohull, catamaran, or motorboat • Boat speed, heading, and wave direction factored in • Adjust time: -1 hour, +1 day, or 'now' • Works for any sea, worldwide The verdict? Honest and with humor — from "Champagne Sailing" to "Vomit Comet". ---------------- MOTION MEASUREMENT — new in 3.0 Lay your phone flat on the deck or in the cockpit. SeaSick measures actual boat motion for 30 seconds via the accelerometer and gives you: • Sea state: from glass-calm to storm • Real-time G-forces with color scale • "How do you feel?" — results based on your condition and measured motion ---------------- WEATHER LOGBOOK — new in 3.0 Keep a logbook of your trip(s): • GPS location (with place name and country) • Wave height, wave period, wind speed & direction • Sea temperature, air temperature, cloud cover, WMO weather codes • Enter manually or fetch automatically (and adjust) • Export as XLSX spreadsheet via AirDrop, email, or cloud ---------------- PREVENTION & RELIEF — new in 3.0 Two sections: prevent seasickness and what to do if you're already feeling sick. • Explained: why do you get seasick? • Behavioral tips, dietary advice, and risk factors • Natural remedies: ginger, peppermint, acupressure bands • Tools and medication overview with dosages • Adjustable font size for reading at sea ---------------- 13 LANGUAGES Fully translated: EN, NL, DE, FR, ES, IT, PT, PL, SV, NO, DA, EL, AR ---------------- FAIR PRICING Pay once, lifetime updates. No subscriptions, no ads, no in-app purchases. • Dark mode • Metric and imperial • No account needed ---------------- Download SeaSick and know what you're in for.
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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.