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.
Swim Set Interval Timer is an easy‑to‑use swim interval timer for swimmers, coaches, triathletes and teams who run structured repeat sets
$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.
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 Swim Set Interval Timer: map the core Health & Fitness 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: Lack of customization options for timers
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No workout history or analytics
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited social features for challenges
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No integration with health tracking apps
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.
Swim Set Interval Timer is an easy‑to‑use swim interval timer for swimmers, coaches, triathletes and teams who run structured repeat sets. Designed for reliability and clarity, it combines iPhone‑based timing with an Apple Watch companion app for quick access and at‑a‑glance progress. Build repeatable swim sets, track intervals accurately, and focus on training—not managing a stopwatch or losing track of set count. Key Features: Flexible interval sets -Build swim sets with configurable intervals and repeat counts. Customizable timing modes -Choose how your intervals display and behave: -Count up or down -Optional goal hold time indicators -Available countdown blinking and/or audible beeps -Color customization to match your preferences or improve visibility on deck Phone‑first, reliable timing -The iPhone acts as the primary timer to ensure consistent and accurate set tracking. Apple Watch companion app -View live interval progress, start sets remotely, and stay in sync with your phone during workouts. Automatic resync -If the Watch display sleeps, it reconnects and updates instantly when you raise your wrist. Sharable set log -Automatically log completed sets and share your workout results with teammates, coaches, or training partners. Simple, focused design -No clutter — just the timing information swimmers and coaches actually need. Who It’s For: -Competitive swimmers running structured sets -Coaches providing interval-based practices from the pool deck -Athletes who want a clear, repeatable interval routine -Anyone who prefers simplicity over overloaded workout apps Apple Watch Notes: The Apple Watch app works as a companion to the iPhone app. Timing continues on the phone if the Watch screen goes to sleep, and the Watch display updates automatically when it becomes active again.
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.