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 Ultimate Stopwatch is a professional timing tool, essential for coaches, trainers, and PE teachers who need to track multiple athletes across multiple events.
$3.99 · 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 Ultimate Stopwatch: 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: Limited lap tracking options
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: In-app purchase confusion
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No background running
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of customization
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 Ultimate Stopwatch is a professional timing tool, essential for coaches, trainers, and PE teachers who need to track multiple athletes across multiple events. Simple to use, but powerful enough to handle all your needs, designed specifically for iPhone and iPad. Unmatched Functionality with No Limits • Unlimited Stopwatches: Track any number of users; up to 180 stopwatches can be displayed simultaneously on an iPad Pro for a single race. • Flexible Race Management: Create unlimited races with customizable locations and notes, switching between them with a single swipe. • Laps Without Limits: Record unlimited laps per stopwatch, with the last 4 to 16 laps displayed. • Background Operation: Watches continue running even when the app isn't running, ensuring you never lose track. • Flexible Timing Adjustments: Save temporary laps or stops to assign later, ensuring accuracy even when multiple runners arrive simultaneously. • Undo mistakes: False Start or tapped wrong person? Undo it! Got the wrong time? Edit it anytime. Add or delete watches, even while race is ongoing. Complete Control at your Fingertips • Customizable Activity List: Tailor the built-in activity list to the sports or events you track. • Individual and Master Controls: Start, stop, or reset each watch independently or all at once. • Diverse Stopwatch Formats: Choose from 25 different layouts to suit your needs, controlling watch/button/text size. • Advanced Timing Options: Switch between split and cumulative displays at any time, and control the precision of time display down to thousandths of a second. Comprehensive People Management • Organize your People: Group individuals into teams or classes for streamlined tracking. • Detailed Reporting: Access race history and performance metrics for each participant, including their personal bests. • Easy Importing: Import contacts directly from your address book, complete with photos and emails. • Photos: so you can tell who's who in a large group. Flexible Launch Choices • Quick Race Launching: Use the volume button to start races without needing to look at your device. • Visual Organization: Automatically sort watches (as each person completes a lap, they drop to the bottom, so next lap they're easy to find) or manually arrange as needed. • Staggered Starts: Spread out your runners over time. • Full-Screen Launch Board: Let each runner knows it's their time to go. • Batch races: launch another group all at once. • Simultaneous Races: Easily navigate between multiple ongoing races. Dynamic Reporting • Add Personal Notes: Enhance reports with notes for each race or participant. • Sorting and Graphing: Sort reports by time or name, or graph your results. • Exporting: Use your data in other apps, like Excel. • Activity Tracking: Monitor which types of activities are timed and locate races by name or map. • Find a race: Search by name, or use the map to find it by location. The Ultimate Stopwatch is not just a tool; it’s a game-changer for anyone serious about timing in sports. With robust features and user-friendly design, it empowers coaches and trainers to focus on performance while effortlessly tracking times.
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.