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.
Meet Mr Smooth and Miss Swinger - two freestyle (front crawl) stroke animations showing you great stroke technique! Watch the animations just before going for a swim to help you visualise improving your own technique ...
$1.99 · 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 Mr Smooth Pro: 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 workout customization options
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of engaging content
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Inconsistent user interface
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.
Meet Mr Smooth and Miss Swinger - two freestyle (front crawl) stroke animations showing you great stroke technique! Watch the animations just before going for a swim to help you visualise improving your own technique for faster and more efficient swimming. If you struggle with any part of your stroke from swallowing water to low sinky legs to developing your catch, then this insightful tool will be invaluable to you. Features include: - 8 viewing angles including directly overhead and underneath - Slow motion, pause and frame by frame forward/rewind* - Remove the water from view for extra clarity - Control of swimming speed (strokes per minute) - Synchronised views across all angles (so you can pause and see that same position from any angle) - Two fundamentally different but efficient styles of stroke, select the one that best suits you as an individual * Hold your finger on the screen to bring up the jog wheel and rotate it to speed up or slow down the animations. Or when paused, rotate the jog wheel to forward and rewind frame by frame This extensive app also includes three full articles on using the animations to improve your technique and a full comparison of the two stroke styles on view - 'The Swinger' and 'The Smooth'. Find out why each one is a great stroke technique and how to make it work best for you. About Swim Smooth: Swim Smooth is an innovative coaching company focusing on improving your individual stroke technique based on your height, build, gender and swimming experience. We have coaching bases in Australia and the UK, and in 2011 we were selected by British Triathlon to write their swimming coaching curriculum. All triathlon coaches in the UK now follow our swim coaching methods. Find out more about us at https://www.swimsmooth.com
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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.