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.
with cutting-edge features that keep you connected both onboard and ashore, zenkou ensures you stay safe and informed—no matter where you are.
Free · 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 Anchor Alarm: ZENKOU PRO: 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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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 report difficulty in setting precise alarm parameters.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: App can drain battery quickly due to constant location tracking.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Some users find the notifications unreliable.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited customization options for alarms.
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.
with cutting-edge features that keep you connected both onboard and ashore, zenkou ensures you stay safe and informed—no matter where you are. instant live alerts & remote monitoring zenkou instantly notifies preconfigured mobile devices when a dragging anchor is detected, empowering timely action. with live technology, boat owners can remotely track their vessel’s location, monitor progress, and receive anchor drifting alarm from ashore. flotilla management zenkou live n2n offers the flexibility to receive alerts from multiple boats and share them with unlimited followers. always on watch (24/7) enable zenkou to run in the background, even when your iphone is locked or you're using other apps. guaranteed through extensive testing over 10,000 boaters trust zenkou. they've enjoyed more peaceful sleep and saved their boats by responding to an anchor watch alarm. we conduct over 100 anchoring test days annually in diverse weather conditions. efficient power usage maximized security at anchor, optimized battery life. navionics®*, satellite, online and offline maps wide selection of maps featuring essential safety details and depth contours. windy® weather forecasts: stay safe, stay comfy* customized for anchoring, providing accurate predictions for wind and swell. marine barometer* detect rapid changes in weather conditions well before they become visible. because when it comes to the sea, knowledge isn't just power, it's protection. ai anchor watch customized anchor watch experience to suit your specific boat. social anchor prioritize safety and build camaraderie during your anchor watch with zenkou anchor alarm. encourage your neighbors to use the app and effortlessly share your anchor points and swing circles, fostering mutual awareness, a strong community, and a safer anchoring experience for all. anchor alarm setting options basic: set the anchor location with a single tap when the device is directly above the anchor point. long-press gesture: easily navigate the map to your desired anchor location and set it with a long press. bearing/ distance: simply point the iphone to the anchor guaranteeing precise anchor alarm based on your preferred direction and distance from your location. manual entry: input the coordinates of your current anchor position. heat map: drop the anchor and adjust the anchor rode length to your preference, allowing the boat to swing freely for a few minutes. monitor the boat's progression on the map, and with a convenient long tap, set the anchor point and effortlessly fine-tune the anchor alarm settings to seamlessly align with the unique behavior of your boat and the surrounding environment. share: receive and validate anchor alarm settings from other zenkou users on the same boat via messaging or email. anchoring mastery, exclusion zones mark exclusion zones by drawing them with your finger. ideal for tight anchorages and advanced anchoring techniques like shore lines, bow-stern anchoring, etc. heat maps gain valuable insights by visually tracking your boat's progression at anchor, revealing patterns, trends, and concentrations. nmea wifi access get real-time boat data like depth and wind speed on your iphone, available anytime, anywhere. ais stay informed about nearby vessels during your anchor watch without needing to step on deck. apple watch receive iphone alerts on your watch or monitor your yacht in real time with the anchor watch live app* by zenkou services enjoy essential features of zenkou anchor pro at no cost! services with an asterisk (*), such as premium*, live*, barometer*, anchor watch live app* and navionics*, require a separate paid subscription. navionics® is a garmin trademark. customizable units multilingual online support 24/7 revolutionize your experience at anchor. stay safer and better informed than ever before. crafted by sailors, for sailors. get it for free now!
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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.