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.
Haptic Fitness Timer is a simple app for Apple Watch, that uses haptic feedback to notify when your timer is up.
$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.
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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 Haptic Fitness 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: Limited exercise variety compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No social features for motivation
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of detailed analytics on performance
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Subscription model may deter casual users
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.
Haptic Fitness Timer is a simple app for Apple Watch, that uses haptic feedback to notify when your timer is up. * Increase focus on your training * The app is designed to improve your workout experience through increased focus by minimising interactions between you and your device. With haptic feedback you don't have to keep checking your stopwatch to see when your next set is up. This results in a less distracting workout experience. * Use in the gym between sets * Simply choose the duration of your timer. Once the timer is complete, the app uses haptic feedback to notify you that it is time to continue with your next set or exercise. * Save time in the gym * Complete your workouts more efficiently with Haptic Feedback Timer by reducing interactions with your devices. This app replaces the traditional timer or stopwatch. * A less annoying timer * A traditional timer continues to ring until the user presses the stop button. Haptic Feedback Timer stops automatically once the user has been notified. This reduces user interactions resulting in a more distraction-free workout experience. ---- Disclaimer: You should not rely on this app as a substitute for, nor does it replace, professional medical advice, diagnosis, or treatment. If you have any concerns or questions about your health or training, you should always consult with a physician or other health-care professional.
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.