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.
"SignalFlags Tool" – get to know and use the international signal flags
$1.99 · 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 SignalFlags Tool: map the core Reference 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 flag information available
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of interactivity
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No user customization options
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Poor navigation
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.
"SignalFlags Tool" – get to know and use the international signal flags • What does this flag mean? The international maritime signal flags represent letters and numbers. In addition to the letter these flags have further meanings in seafaring. The appealing app "SignalFlags Tool" tells you the meaning of both a stand-alone flag in different maritime situations as well as the meaning of the flag in combination with other flags. On the detail screen for each flag "SignalFlags Tool" also shows the phonetic name including the international pronunciation as well as the associated International Morse Code. By tapping on the Morse Code you can show the code using light signals. For all letters which are used as a sound signal you can also play the sound signal. • You want to write using flags? • You want to decode a text written with flags? With "SignalFlags Tool" this is quite simple. And – unlike most other tools – when writing "SignalFlags Tool" uses the substitute flags in accordance with international rules, rather than using a flag already used one more time. • How are the flags are arranged for a dressing overall? The arragement of the flags for a dressing overall is different in the countries. "SignalFlags Tool" shows you the arragements used in Germany, the UK and the US. "SignalFlags Tool" provides a responsive user interface, so that the display of your device is always used optimally – whether on a small or a large iPhone screen or on the iPad Pro. All flags are shown with high resolution details and textures. An animated help function explains the functions of the app. "SignalFlags Tool" includes all texts in English and German. If you don't have a set German as user language for your device, all information will be displayed automatically in English. If you like you can switch to German language manually.
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.