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.
Stop digging through your fitness app to find the numbers that actually matter to you
$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 Runalyzer: 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: Limited user engagement features like social sharing
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Basic analytics without insights or comparisons
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of personalized training plans
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No integration with other fitness platforms
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.
Stop digging through your fitness app to find the numbers that actually matter to you. Runalyzer pulls your workouts straight from Apple Health and puts the stats you care about on one screen — always up to date, exactly the way you want them. Build your own dashboard of workout tiles. Each one answers a specific question: How many miles have I run this month? How many 5Ks have I done this year? What's my weekly cycling distance? Tap + and tell Runalyzer what you want to track — it does the rest. Every tile is yours to configure Choose what to display (total distance or workout count), which activities to include (running, walking, hiking, or cycling), your time range, and your preferred units. Add a custom name and pick a color. Stack as many tiles as you want and drag them into the order that makes sense to you. Set a goal, watch it fill Add an optional goal to any tile and a progress ring appears. Hit it and Runalyzer celebrates. Set repeating goals and they reset automatically — your weekly mileage goal is ready again every Monday without you touching a thing. On your home screen Add a Runalyzer widget to your iPhone home screen and your metric is always visible — current value and goal progress, right there without opening the app. Add as many widgets as you like, one for each metric you want at a glance. Dig into any metric Tap a tile to see the full story: your total front and center, average distance, average pace or speed, and a complete list of every workout that went into the number. Sort by date, distance, or pace. Group by day, week, month, or year to see how your training adds up over time. Two charts — distance and pace or speed — show how you're trending. Only count what qualifies Distance filters let you tell Runalyzer exactly which workouts belong in a tile. Count only your 5K efforts, only your long runs, only your rides over 30 km — you set the rules. Pace or speed, your call Running and walking metrics show pace. Cycling metrics show speed. Or override any tile to display whichever you prefer. Your data stays on your phone Runalyzer reads directly from Apple Health and does everything locally. No account. No server. No ads. Apple Health's own permissions control what the app can see. Available in English, Spanish, French, and Brazilian Portuguese.
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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.