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 Logbook App is an automated electronic logbook for your iPhone or iPad, you can add entries manually or let your vessel's log fill in automatically in the background
$15.99 · 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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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 Ship's Log Book for Captains: 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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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 complain about the lack of cloud backup.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Users find the UI outdated and clunky.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Some users report issues with weather data accuracy.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Users want more customization options for logs.
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.
The Logbook App is an automated electronic logbook for your iPhone or iPad, you can add entries manually or let your vessel's log fill in automatically in the background. This logbook app was developed by sailors for sailors, but also powerboaters will get their money's worth. FEATURES # Automatically create logbook entries while you enjoy sailing # Automatic retrieval of weather data for each entry from the internet (choose between different weather providers) - Weather condition e.g. sunny, fog, thunderstorm... - Air pressure (also offline if the device has a barometer) - Wind direction - Wind force - Degree of cloudiness - Air temperature - Water temperature - Amount of precipitation - Significant wave height # As well as other data fields per logbook entry which can be filled automatically - Course over ground - Course over ground - Position in coordinates according to WGS84 - Position as text - GPS accuracy - Engine hours - Log # Automatic location e.g. "2.3 nm south of lighthouse Cape Savudrija". # more fields to fill - Water tank level - Battery level - Fuel tank level - Grey water tank level # Add pictures to entries # Sunrise and sunset times and nautical dawn and dusk times. # Measure current heel and add to logbook entry # Display GPS accuracy # Display distance traveled in color (by speed or propulsion type motor/sail) on the chart. # Statistics on the overall course and on each individual day # Export the logbook as CSV for a spreadsheet program # Export as PDF # Export as GPX # Export as KML # Export of the complete SQLite database # Checklists: packing list and safety briefing Please visit my website for more screenshots and more details! NOTE: Please note the following if you have enabled automatic logging in the background (indicated by the blue frame in the app): Continued use of GPS in the background can drastically reduce battery life. In our experience, however, a full day of sailing can be done with it, nevertheless don't forget the 12V charging cable ;-) SUPPORT This app is chargeable, so I take it with the support also very seriously! Please refrain from negative reviews without at least contacting me first. I was able to solve every problem from buyers who contacted me. I have also implemented many feature requests from buyers and am very grateful for constructive feedback! You can reach me like this: * reach me via email which is visible via the support URL here in the store * via Discord or Telegram, linked in the app here: Settings > Support * send a message from within the app using the menu item: Settings > Support
Written user reviews are not shown here. Check current App Store reviews >
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.