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 app is intended for swimmers and their coaches
$0.99 · 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 Swimming Splits: map the core Sports 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 tracking multiple swims effectively.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited historical data visualization options.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchase process can be confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of social sharing options.
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 app is intended for swimmers and their coaches. Using the app is pretty straightforward. The user picks the swim event of their choosing and the target time for that event and the app recommends optimal splits for that time. Though the algorithm for recommending splits is simple (using percentage of speed for each part of a race), it is not really possible to calculate the times during a swim meet without a tool like this app. The swimmer and his coach can then discuss the splits before the race. After the race they can compare the recommended splits with the actual splits from the race. There is an optimal split ratio for middle-distance and long-distance swimming events based on the current scientific discoveries. The first quarter of the race should generally be the fastest. The second quarter of the race should be the slowest and the third and the fourth quarter should be slightly faster then the preceding quarter of the race because of the increasing amount of energy supplied by the anaerobic energy system. The difference between quarters of the race also depends on the stroke as butterfly is the most exhausting and strokes change during the medley events.
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.