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.
Tide Lookup is the simplest way to check the tides — and everything around them — for any U.S
$2.99 · 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.
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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 Tide Lookup: 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: Limited location options for tide data
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of detailed tide alerts
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Minimal visual design
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No offline mode
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.
Tide Lookup is the simplest way to check the tides — and everything around them — for any U.S. coast. Fast, private, and free of ads, logins, and subscriptions. Buy it once and it's yours. Whether you fish, boat, surf, paddle, or just love the shore, Tide Lookup puts the water at your fingertips. TIDES, RIGHT NOW - The current tide height and whether it's rising or falling, updated every minute - Today's high and low tides, with exact times and heights - The full week of tides for the same spot - Pick any future date to plan ahead SAVED FOR WHEN NOAA DOESN'T - After you open a station, Tide Lookup saves its predictions on your device - If NOAA's service is briefly unavailable, or you're offline, stations you've already viewed still show their tides - Tide predictions are astronomical, so saved data stays accurate (weather, radar, and stations you haven't opened yet still need a connection) THE TIDE, AS A CURVE - Watch the day's rise and fall on a clean graph, with a live marker on the tide right now - See the REAL tide: overlay the actual measured water level against the prediction, and watch how wind and weather push the tide off forecast — available at stations with a live gauge WIND - A live compass with current speed, direction, and gusts - The next few hours at a glance, plus the week ahead WEATHER - A 7-day local forecast for the same spot — highs, lows, and conditions - Tap any day for the hour-by-hour breakdown THE WEATHER MAP - A full-screen map with live NWS radar over the coast - Every nearby tide station pinned right on it — tap one to jump straight to its tides - Pan and zoom to explore the coastline, with your location shown MORE - Moon phase and more, right on the home screen - Save your favorite spots for one-tap access - Search any town, ZIP, or NOAA station — or use your location - Switch between nearby stations along bays and inlets BUILT ON OFFICIAL DATA Tide predictions and measured water level come from NOAA. Weather, wind, and radar come from the U.S. National Weather Service. It's the real data, presented simply. PRIVATE BY DESIGN No account. No ads. No tracking. No subscriptions. Your location is used only on your device to find the nearest station and show your spot on the map. Tide Lookup is a one-time purchase — buy it once, use it forever. Note: Tide Lookup provides estimates for planning and is not intended for navigation or safety-critical decisions.
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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.