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 Fitbit app is now Google Health, bringing out your best with effortless tracking and personalized coaching that’s built with Gemini
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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 Google Health (Fitbit): 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: Syncing issues with connected devices
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited food database
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inconsistent workout tracking
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: User interface complexity
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 Fitbit app is now Google Health, bringing out your best with effortless tracking and personalized coaching that’s built with Gemini. Personalized AI fitness plans, sleep insights, and health data make it easier than ever to stay on track toward your fitness goals. You set the vision. Google Health brings together your fitness, sleep, and overall wellness. Spot key trends, and make choices that help you reach your next milestone on your terms – all with confidence that your data is private and secure. Sync Google Health with your Fitbit, Pixel Watch, your favorite health tracking apps, and your medical records (available in selected countries). Log your metrics and track patterns, like sleep, workouts, nutrition and menstrual cycles. Built with Gemini, Google Health Coach provides expert guidance on everything from sleep and nutrition to running and strength training. (Available in certain countries with Google Health Premium) GET PERSONALIZED FITNESS PLANS: Whether you’re trying to lose weight, build muscle, improve cardio, or establish healthy habits, Google Health designs workout plans around your goals. Tell your AI fitness coach about your preferences and routines to create a long-term fitness plan and get daily workout recommendations. Google Health will track your progress and provide insights to guide your wellness journey. TRACK YOUR SLEEP QUALITY: Take the guesswork out of rest and recovery with detailed insights paving the way to better sleep. Your AI coach will analyze your nightly sleep stages, identify long-term trends, and provide actionable guidance based on that data. You can even get a personalized sleep schedule, bedtime reminders, and mindfulness exercises to keep you calm. These sleep quality insights are powered by an improved sleep algorithm, so you can pinpoint interruptions, limit stress, and improve your mood. ENJOY A HOLISTIC VIEW OF YOUR HEALTH: Receive real-time guidance on your fitness, sleep, and overall wellness 24/7. Stay informed about your daily health with notifications that spotlight trends and celebrate your achievements, all based on your unique ranges. Ask your coach follow-up questions to get a deeper understanding of each insight – and get suggestions for what you can focus on next. Explore women’s health features, tracking your menstrual cycle to understand how each phase affects your routine. By keeping all of your data in one place, Google Health gives you a complete view of your wellness. PERSONAL, PROACTIVE, SECURE, AND IN YOUR CONTROL: All of your data is protected by built-in security with easy-to-use privacy settings keeping you in control. Google Health is shaped with the help of leading experts across medicine, science, and technology, keeping your wellness in good hands. Google Terms of Service: https://policies.google.com/terms Google Health Terms of Service: https://support.google.com/product-documentation/answer/13511576 Fitbit Terms of Service: https://www.fitbit.com/sg/legal/terms-of-service *Some features require Google Health Premium subscription (sold separately), Google Health app, Wi-Fi, and internet connection. Features subject to change; availability varies including by country. Not intended for medical purposes. Gemini features work independently of Gemini apps. Check responses for accuracy; results may vary.
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.