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.
Most people underestimate what they're paying for subscriptions by a lot
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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 Winnowed: Subscription Tracker: map the core Finance 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: Complex, confusing interface
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Slow bank connections
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Security concerns
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.
Most people underestimate what they're paying for subscriptions by a lot. The streaming service. The tool you used twice. The membership from two years ago. The usual answer is a spreadsheet, a dashboard of charts, or a cancellation concierge. None of them really work, because the problem isn't a tracking problem. It's a noticing problem. You need a moment, a few times a year, to sit quietly with the list and decide what still belongs. Winnowed is built around that moment. Add your subscriptions by scanning a statement or typing them in. Then, at a cadence you choose (monthly, quarterly, or twice a year) the app walks you through each one, card by card. Swipe right to keep. Left to cut. Down to pause. Distinct haptics for each. A three-second undo if you change your mind. The session closes with a quiet card showing what you kept and what you cut. While a review is in progress, it lives on your Lock Screen and in the Dynamic Island. Make decisions without ever opening the app: Keep, Pause, or Cut from the expanded view. The activity stays present as long as you need it, and quietly disappears when you're done. The goal isn't fewer subscriptions. It's making sure the ones you keep still match the life you're actually living. Your History screen is a record of every decision you've made, sortable by date, savings, or session size. FEATURES: — Scan bank statements with Apple's on-device Vision framework. Winnowed finds your subscriptions and asks which to add. — A five-stage harvest gradient (sage to burgundy) that warms as your spending grows. — Live Activity for active reviews on Lock Screen and Dynamic Island. — Three home screen widget sizes, with snoozable review-due prompts (3, 7, 14, or 30 days). — Search and filter your full subscription stack. — Sort review history by recency, biggest impact, or session size. — Export your full history as a PDF, anytime. — Choose your review cadence: monthly, quarterly, or twice a year. — Everything is on your device. No accounts, no servers, no tracking. Your data never leaves your phone. Winnowed is designed, built, and supported by one person.
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.