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.
Single Step helps you track progress toward any goal that can be measured with numbers
$0.99 · 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 Single Step (on the Journey): 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 community support for troubleshooting.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Complicated data tracking for users not familiar with fitness metrics.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Potential lack of motivation features such as challenges or social sharing.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Users may find the subscription model confusing.
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.
Single Step helps you track progress toward any goal that can be measured with numbers. Whether you want to lose weight, run more miles, do more pushups, or save money - Single Step shows you how far you've come and how far you have to go. Perfect for: – Weight loss or gain goals – Fitness milestones (miles run, pushups, etc.) – Savings targets – Reading goals (pages or books) – Any measurable personal goal Features: – Create goals with custom targets and units – Track both increasing and decreasing goals – Beautiful journey visualization shows your progress – Log progress entries with one tap – See your complete progress history – Progress colors change as you get closer to your goal – Celebration when you achieve your goal – All data stored locally on your device – Works offline - no account required How it works: Set your starting point and target, then log your progress as you go. The journey path fills in as you get closer to your goal, changing from orange to blue to green as you progress. Every big achievement starts small. Single Step helps you see that every bit of progress matters on your journey.
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.