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.
Practice the viral Japanese Towel Method with guided timing, challenges, progress tracking, education, and easy sharing to your socials to connect with and inspire others.
$1.99
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.
Your first Build Kit is free with a verified email.
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 The Japanese Towel Method: 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Practice the viral Japanese Towel Method with guided timing, challenges, progress tracking, education, and easy sharing to your socials to connect with and inspire others. The Japanese Towel Method is the simple rolled towel stretching practice that has gone viral across social media. The practice is performed while lying on a firm, flat surface with a tightly rolled towel positioned beneath the lower back. With the body placed in a specific position and the arms and legs gently extended, the practice encourages you to slow down, stretch, and become more aware of your posture, positioning, and body. Sessions take only a few minutes, making the method easy to incorporate into a daily wellness or mobility routine. The Japanese Towel Method app gives you everything you need to learn the practice, follow along, stay consistent, document your experience, and share to socials to connect with other people practicing alongside you. YOUR PRACTICE Choose your practice time, follow step by step visual guidance, use the guided timer and voice prompts, and record each completed session. Take on a structured challenge or simply practice at your own pace. Your calendar, journal, and progress tracking keep everything organized in one place. FEATURES • Guided Japanese Towel Method practice • Step by step positioning and visual guidance • Guided timer with voice prompts • 7, 14, and 30 day challenges • Calendar and progress tracking • Daily journal and personal notes • Educational information about the method • FAQs, origins, sources, and references • Access to my original 30 day Japanese Towel Method experience • Tools designed to help you build a consistent practice What began as a simple practice has grown into a viral conversation, with people sharing their experiences, questions, routines, and progress across social media. This app brings the practice, education, tracking tools together in one dedicated space. A rolled towel. A few quiet minutes. Your practice, your pace. This app is intended for educational and general wellness purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
Written user reviews are not shown here. Check current App Store reviews >
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: Inaccurate tracking
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Generic workout plans
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No social features
Validate with people who use this workflow before building.
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.
Not assessed in a Build Kit yet.
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.