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.
Polar is a calendar-clock that combines an analog watch face with a 24-hour calendar bezel, allowing you to read the time and visualize your day in one glance.
$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 Polar Watch: map the core Productivity 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 user reviews indicates potential usability issues.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Many fitness apps suffer from feature bloat.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Users may find it hard to log activities consistently.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Privacy concerns with health data.
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.
Polar is a calendar-clock that combines an analog watch face with a 24-hour calendar bezel, allowing you to read the time and visualize your day in one glance. Tap to create and edit events; drag to resize or reschedule; color-code by category. Assign custom routines to different days of the week. Use the Schedule Mode button to toggle between Loop and Routines mode. Customize your watch face, complications, and bezel to match your style. FEATURES • Skeuomorphic mechanical watch face design • Large, medium, and small Home Screen widgets • StandBy Mode compatible widgets • Monochrome Lock Screen widget • Customizable categories • Loop mode — a repeating 24-hour schedule with a preferred Day Start time • Customizable routines, with independent Day Start times, accessible via the Planner tab (+) or Routines tab • Ability to copy existing Planner schedules into new routines • Ability to copy and paste existing Planner events for easier schedule/routine setup • Event notifications • Option to turn on concurrent notifications for both Loop mode (e.g., higher-level schedule) and Routines mode (e.g., more detailed schedules) • Overlapping day-window handling for adjacent routines with mismatched Day Start times, across the Watch, Planner, and Routines tabs • 3 subdial complications: Event Timer (tap to toggle overlapping events within the same schedule), Day/GMT, and Stopwatch (tap to start/stop, hold to reset) • Event Title Window complication with tappable scroll animation • '10:10' complication that parks the watch hands at the 10:10 position, clear of other complications for better readability • Adjustable bezel with satisfying haptic feedback • System, Light, and Dark appearance modes CUSTOMIZABLE DIAL & BEZEL APPEARANCE • Choice of arrangement of subdial complications • Choice of Roman Numeral or Baguette hour markers • Option for truncated indices • Treatment of elapsed events and bezel positioning
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.