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.
Ship's Bell is primarily an acoustic clock that sounds half-hourly or hourly time signals
$5.99 · 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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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 Bell: map the core Travel 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 notification features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: User interface could feel outdated
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of social features for sharing itineraries
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No offline access to itineraries
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.
Ship's Bell is primarily an acoustic clock that sounds half-hourly or hourly time signals. Without taking the phone out of your pocket you can easily keep track of time. The principle of this bell was founded in traditional seafaring. Seafarers used the bell to keep track of their four-hourly duty watches. The first half hour is signaled by a single bell strike. Another bell strike is added every half hour, ending with eight bell strikes. To hear the bell strikes better, they are grouped into double chimes. Eight bell strikes signaled a watch change – at midnight, 4 am, 8 am, 12 pm, 4 pm and 8 pm. With just eight different signals, being repeated in six cycles during the day, you will know what time it is every half and full hour. • Ship's bell according to the seafaring tradition • Two different kinds of chimes: classic bell or a modern synthesized sound • Option to strike only once each hour • Two different chimes for hourly signals: a single beep or a triple signal counting down to the full hour • Displays the current time on a maritime 24-hour clock face • Shows Greenwich Mean Time (GMT) • Switch to quickly enable or disable the acoustic signals A new addition in version 3.0 is the Tide Clock. An additional clock hand and a tide ring can now be activated on the two dials of the glass clock (12-hour or 24-hour dial). This makes it possible to estimate the time until the next high or low tide in the style of a mechanical tide clock. The tide clock hand makes one revolution within 12 hours and 25 minutes independently of the hour clock hand and thus shows the average time between two high or low tides. The indices on the tide ring show the hours before and after a coming or past high or low tide. Dear customers, If there are any issues with this app, please send an email to our support team. We will get back to you as soon as possible!
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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.