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.
Ref90 – The Referee’s Match Companion
$7.99 · 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 Ref90 - Referee Watch: 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: Lack of user engagement features
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited customization options
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No support for multiple sports
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Minimal onboarding experience
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.
Ref90 – The Referee’s Match Companion Managing a game is hard enough. Let your Apple Watch handle the admin. Ref90 is built for grassroots to semi-pro football referees. It helps you track everything that matters during a match — quickly, clearly, and without breaking focus. • No phone. • No signal. • No distractions. Key features • Match timers – Kick-off, half-time, added time, sin bins, water breaks and period breaks, all managed directly from your wrist. • Full match control – Log goals, fouls, substitutions and key incidents in seconds, even while play is live. • Ref-first design – Built for fast taps, sweaty hands and quick glances. No fiddly menus. • Works offline – No iPhone or internet connection required. Ideal for rural pitches and Sunday mornings. • Post-match review – Check full match logs after the final whistle to support reports and admin. • Easy sharing – Share game logs, reviews and bank details when needed. • Earnings tracking – Keep track of match fees and season totals. • Digital coin toss – One tap. No lost coins. No arguments. Why Ref90? Because referees should referee — not juggle notebooks, watches and guesswork. Ref90 keeps the basics under control so you can focus on positioning, decisions and player management. Designed for • Grassroots referees • Semi-pro officials • Sunday league to Saturday tournaments • Anyone who wants less hassle on match day This is a one-time purchase that permanently unlocks the app. No subscriptions or recurring payments. Terms of use: https://ref90.com/terms Privacy policy: https://ref90.com/privacy
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.