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.
ClubFitter Pro — AI-Powered Club Fitting, Built for Every Golfer
$2.99 · 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 ClubFitter Pro: map the core Sports 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 customization options for fittings
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No community or support features
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchase friction
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.
ClubFitter Pro — AI-Powered Club Fitting, Built for Every Golfer Every golfer chases the same thing: a few more yards, a little more consistency, the setup that finally clicks. The average amateur now drives the ball over 245 yards — up more than 30 yards in a decade — as manufacturers and golfers alike keep pushing equipment further. But more gear options also means more confusion about what actually fits your swing. ClubFitter Pro cuts through the noise. Built using AI-developed physics models — calibrated against real launch monitor data — it turns your own swing speed, smash factor, launch angle, and spin numbers into clear, personalized recommendations. What ClubFitter Pro does: Driver Analysis — Enter your Trackman or launch monitor numbers and get instant feedback on smash factor, swing weight, launch, and spin, plus specific head and shaft suggestions matched to your swing. Iron Fitting — See your 7-iron carry distance, full-bag yardage gaps, and swing weight, with recommendations to keep your set consistent and properly gapped. Ball Fitting — The cheapest upgrade in golf. Get matched to a ball compression and construction that fits your swing speed — often worth 5-15 extra yards for $7-17 a sleeve. Personalized Report — A complete breakdown of your numbers with plain-English explanations of what's working, what's not, and what to change first. Education Guide — Learn what actually matters in driver heads, shafts, iron lofts, and golf balls — so you understand why a recommendation makes sense, not just what it is. Why it's different Professional fittings are great — but they're built around the inventory in the shop, which often steers toward premium combinations. ClubFitter Pro gives you a data-driven starting point before you go, so you walk in knowing exactly what to test. Save time, save money, and get more out of every fitting session. Whether you're a 25-handicapper looking for more forgiveness or a low single-digit player chasing the last few yards, ClubFitter Pro's AI-built physics engine works for every skill level — completely offline, with no subscriptions, no ads, and no data collection.
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.