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.
Marine Navigation App that turns your Apple Device in to a full function chart plotter
$30.99 · 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 NavLink US: 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: High price point may deter users
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Complex navigation options could confuse users
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchases can be confusing
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.
Marine Navigation App that turns your Apple Device in to a full function chart plotter. Features include: · Realtime GPS position plotted on Marine charts derived from NOAA data (Vector (ENC) & Raster (RNC)) · AIS overlay when connected to compatible wireless AIS system · Waypoints & routes with full route editing and planning function · Position, COG, SOG, VMG, bearing, distance & ETA displays · Configurable chart layers · HorizonView overlays navaid and targets onto iPad/Phone camera display · Automatic free chart updates included for 1 year · Weather buoy data · A-B chart ruler for quick & easy bearing and distance measurement · All NOAA US charts are included in the price · Optional in-app purchase of CA charts AIS Functionality When connected to an AIS system via a wireless NMEA link, NavLink will provide a real time overlay of AIS targets and CPA and TCPA alarms. Internet AIS requires Boat Beacon app HorizonView Overlay chart & AIS objects on the iPhone or iPad camera image to create an augmented HorizonView display, that makes Nav-Aid & vessel identification simple and reliable Plan & sail routes Instant route and waypoint creation by tapping on screen. Route reverse function and route overview with inter-leg bearing and distance. Share your routes via dropbox and email with other users NavLink Charting NavLink utilises the latest S57 based NOAA digital mapping & features automatic free updates for 1 year. With vector mapping, you can manage your layers of data to de-clutter the screen or maximise information. NavLink supports all key charting feature such as buoys, lights, bridges, depth contours, spot depths, depth contours, anchorage & military areas, weather buoys Interfacing NavLink is compatible with all Digital Yacht's wireless NMEA devices such as the iAIS, WLN10, WLN10HS, NavLink, iNavHub & PilotLink that stream wireless AIS data to your Apple device If you have a WiFi-only iPad you will need an external Bluetooth GPS receiver to enable navigation. 3rd Party units are available such as the Garmin Glo. Please note: Continued use of GPS running in the background can dramatically decrease battery life Subscriptions Your purchase includes 12 months free updates to the included chart set. At the end of the 12 month period continued access to ongoing chart updates is available via an in-app purchase. Charts for other regions may also be added to your product via optional in-app purchase. Our in-app purchases are 1 year subscriptions, which automatically renew at the end of the subscription period unless auto-renew is turned off at least 24-hours before the end of the current period. Payment will be charged to your iTunes Account at confirmation of purchase, and will be charged for renewal within 24-hours prior to the end of the current period. Pricing for our 1 year US Charts update subscription is $9.99. Subscriptions may be managed by the iTunes account holder and auto-renewal may be turned off by going to Account Settings after purchase. No cancellation of the current subscription is allowed during active subscription period. Privacy policy:- http://seanav.net/digitalyacht/privacy.php Terms and conditions:- http://seanav.net/dyiostsandcs.php Safety Notice NavLink & the charts are intended to be used as an aid to navigation. Only official government charts and notice to mariners contain all of the current information needed for safe navigation. This product's features cannot be relied on to be complete or accurate and may vary locally. It is the Captain's or Boat Owner's responsibility to use official government charts, notice to mariners, caution, sound judgement and proper navigational skill when operating their vessel and using this or any other Digital Yacht product. By purchasing this App, you are accepting the limitations of this app and the NOAA charts. Third Party Licenses and Notices NOTICE: US Marine Charts are derived from official NOAA Electronic Navigational Charts.
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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.