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.
Cadence helps you track your Daily over Decades (DoD) fitness challenge with precision and clarity.
$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 Endurien DoD tracker: 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 engagement features; users may lose interest.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Poor user onboarding can lead to confusion.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of social features reduces motivation.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Minimal customization options for tracking.
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.
Cadence helps you track your Daily over Decades (DoD) fitness challenge with precision and clarity. FEATURES: • Choose your challenge track: EPIC (300 sessions/year), 300, or 200 • Visual progress board showing all 200-300 sessions as you complete them • Track daily calories, weekly minutes, and annual sessions • Automatic sync with Apple Health (Strava, Runkeeper, Nike Run Club, and more) • Log workouts manually or from past dates • Level-based tracking with automatic downgrade if requirements aren't met • Rolling 365-day challenge period • Clean, minimalist black and white design CHALLENGE TRACKS: • EPIC: 300 sessions/year, 300 min/week, 300 cal/day, plus 300k steps/month and 300k lbs lifting volume/month • 300: 300 sessions/year, 300 min/week, 300 cal/day • 200: 200 sessions/year, 200 min/week, 200 cal/day PROGRESS TRACKING: See your progress at a glance with a visual board game-style progress tracker. Each completed session fills in a box, showing your journey toward your annual goal. AUTOMATIC SYNC: Connect with Apple Health to automatically import workouts from your favorite fitness apps. No manual entry needed for most workouts. LOCAL & PRIVATE: All data is stored locally on your device. No accounts, no cloud sync, no data sharing. Your fitness data stays yours. Perfect for serious fitness enthusiasts committed to long-term consistency and building lasting habits.
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.