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.
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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 Whisper: On-Device AI: map the core Productivity 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 functionality compared to web-based AI tools
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: UI can feel cluttered or overwhelming
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inconsistent performance based on device capabilities
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited customization options for users
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.
Whisper is your private, on-device AI assistant. Built for people who don’t want their data going anywhere. Whisper runs entirely on your iPhone. No cloud servers. No tracking. No data harvesting. No “trust us” promises. Every message is processed locally on your device using offline AI models, so your conversations stay yours - not ours, not Big Tech’s, not anyone’s. Why Whisper is different... • Fully offline AI: everything happens on your iPhone hardware. • No accounts, no sign-ups, no data collection. • No internet required for core chat features. • Fast, responsive, low-energy models optimised for Apple devices. • Built for privacy from day one, not bolted on later. Use Whisper for anything • Ask questions, learn faster, or get help thinking things through. • Rewrite emails and messages without sending your data to a server. • Brainstorm ideas, plan your day, or get instant explanations. • Create drafts, summaries, and notes... privately. Whisper is made for people who want the power of AI without giving up control of their digital life. If you care about: • Privacy • Security • Offline capability • Zero data retention • Owning your conversations …Whisper is built for you. Whisper will never rely on ads, profiling, or data extraction. Your device is your intelligence engine - we simply give you the tools. Open Source & Verifiable Whisper’s codebase is publicly available under a Fair Source license. Anyone can inspect the code to verify what we promise: your conversations stay on your phone and never touch our servers.
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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.