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.
Put in your earbuds, press play, and let a 100 Hz sound help you feel more comfortable during travel — no pills, no patches.
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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 Stillwave: Travel Comfort: map the core Lifestyle 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 user reviews may deter new users.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Difficulty in finding specific accommodations.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Subscription model may confuse 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.
Put in your earbuds, press play, and let a 100 Hz sound help you feel more comfortable during travel — no pills, no patches. Stillwave plays a research-backed 100 Hz sound frequency designed with travelers in mind. Inspired by peer-reviewed university research on sound and the vestibular system. INSPIRED BY RESEARCH A 2025 study from Nagoya University (published in Environmental Health and Preventive Medicine) explored the relationship between 100 Hz sound exposure and the vestibular system. Stillwave brings this concept to your earbuds. HOW IT WORKS 1. Put in your earbuds (AirPods work great) 2. Tap Start — a gentle 100 Hz tone plays for 60 seconds 3. Use the 2-hour session timer to track your listening FEATURES • One-tap start — no setup, no configuration • 60-second sessions — quick and unobtrusive • 2-hour session countdown — know when to listen again • Works in the background — use other apps during your session • Mixes with your music — no need to pause your playlist • Smart earphone detection — guides you to optimal audio settings • AirPods optimization — confirms when optimal device is connected • Volume guide — ensures optimal sound levels DESIGNED FOR TRAVELERS • Road trips and long drives • Flights and air travel • Cruises and boat trips • Bus and train commutes • Anyone looking for travel comfort WHY SOUND? Stillwave offers a different approach to travel comfort — a sound-based experience backed by university research, delivered through earbuds you already own. Stillwave is a wellness tool. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease or condition. This app does not provide medical advice. Individual experiences may vary. If you have health concerns, please consult a healthcare provider.
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.