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.
Biofeedback is the future and the future is now - for everyone
$9.99 · 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 VaYou Biofeedback Meditation: 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: Users may find the session selection overwhelming
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited free content available
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inconsistent biofeedback integration
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Subscription renewal confusion
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.
Biofeedback is the future and the future is now - for everyone. No additional body sensors are needed anymore! Just take your iPhone and start VaYou. VaYou Breath is innovative sound biofeedback. The app connects you directly with yourself by transforming your abdominal breathing into dynamically generated sounds. It is very simple! You breathe relaxed and VaYou generates sounds from it - directly shaped by your breathing. With the help of real-time biofeedback, your breath, mind and heart increasingly flow as one. VaYou Breath integrates with Apple Health by updating your values for resting heart rate, respiratory rate, and mindful minutes. Key VaYou benefits • Biometric Integration - VaYou provides advanced real-time breath and pulse detection without the need for additional wearables or expensive medical sensors. • We have gone to the technical limits. VaYou converts the iOS motion/acceleration sensor data stream into high quality biosignals for breath and pulse (pulse only in lying position). • In order to support the relaxation process, the VaYou algorithms learn from your biosignals and derived parameters how to best design the sounds so that they are most effective for you at that moment. • No online connection needed while using - activate airplane mode for an undisturbed and healthy experience! No other app or desktop software provides biofeedback like VaYou Breath. Just listening to the breath-generated sounds leads you into a very personal flow experience. Your consciousness is more and more "absorbed" by the process, your thoughts come to rest. The mental state can be described as relaxed and calming breath mindfulness. It is almost automatic to "stay with the breath", easily and effortless. Unlike with apps where you have to understand and follow spoken instructions, with VaYou Breath you can "switch off" right from the start. The resulting flow experience brings body and mind into harmony and this has a regenerating effect. The regular use of VaYou Breath can have a generally positive effect on body and mind. Some of the reported effects are • Calming the flow of thoughts • Reduction of stress levels • Self regulation of the heart and breathing activity • Increase of creativity • Improvement of mood • Improvement of sleep. IT'S AS SIMPLE AS THAT: Put on good headphones and choose one of the perfected Sound~Flows. Then select the duration, press START and place the iPhone on your lower abdomen, just below the navel. (It's usually better to loosen a belt if you wear one and slide the iPhone halfway into the belt line of your trousers or skirt.) Keep breathing and listening! LIVE 1 and LIVE 2 is the app's main biofeedback mode. To be even more flexible, there is also a PACING mode, in which an adjustable breathing rhythm is played, which you simply breathe along. Without the need to look at the screen. It is actually very easy to get into your personal "Flow~Breathing" and to experience and enjoy the balancing positive effect. WHAT YOU GET: ▪ The VaYou biofeedback algorithm that turns your breathing movements into amazing Sound~Flows ▪ The "Flow Journey" Sound~Flow, which guides you through a universe of different breath~sound experiences up to 30 minutes duration ▪ The "Four Fully" Sound~Flow for very effective and recreational short breaks ▪ All other Sound~Flows can be downloaded as in-app purchases within the app. And of course you get them for your LIFETIME, even if you change or loose your device. PRICES: • No subscription, no automatic renewal • No hidden costs or unnecessarily large packages • You only pay what you really like and want. Wishes, questions and feedback are always welcome: [email protected] or at https://vayou.app/usergroup VaYou is Time for You. NOW is Time for You!
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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.