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.
TrailPay: More Steps, Greater Value
Free · 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 TrailPay:Health & Wealth: 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 integration with health tracking devices
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of user engagement features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Poor user interface design
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Inconsistent performance and bugs
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.
TrailPay: More Steps, Greater Value From morning runs and evening runs to daily commutes and leisurely strolls—every step you take quietly accumulates, bringing you tangible rewards. No need to check in, no need to set goals. Your steps are automatically recorded in the background, converting daily activities into actual earnings. Sweat doesn't lie; your data brings rewards. The more you exercise, the more you earn. Every step puts you one step ahead. Main Features Footprint Bank Your steps are your assets. Daily steps are automatically deposited into your personal Footprint Bank, accumulating wealth for you around the clock. Follow your "Step Asset Trend" to clearly understand how each walk accumulates into considerable digital wealth. The more active you are, the higher your account balance. Exchange Platform You can exchange your earned Vitality Coins here. Redeem popular gift cards and selected lifestyle products anytime, anywhere, however you like. New users unlock the "Walking Task Board": Complete easy and fun tasks to instantly receive rewards. Zero threshold, zero pressure. Before you know it, walking becomes a truly enjoyable activity. Mind Body Compass Step tracking and hydration reminders, all in one place—in sync with your body's rhythm. Every hydration reminder and every activity record traces a clear health trajectory on your compass. Data is readily available, easy to manage, and under your control. TrailPay is more than just a pedometer. It's a pocket-sized energy converter—silently transforming your body's energy into everyday joys. Before you know it, health and wealth go hand in hand. Start now. Turn every step you take into an accessible reward. Privacy Commitment Your activity and location data are entirely yours,under your control. Used only with your explicit permission and never shared with third parties. We will strive to protect your privacy. Contact Us [email protected]
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.