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.
Hook is the social music platform where you can create, connect and discover through the artists you love.
Free
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.
Your first Build Kit is free with a verified email.
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 Hook - The Social Music App: map the core Music 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: Can't play offline
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Algorithm doesn't understand taste
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Shuffle-only on free tier
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.
Hook is the social music platform where you can create, connect and discover through the artists you love. 1M SONGS. 18K ARTISTS. FULLY LICENSED. Real songs from real artists who have opted in to Hook. Every track is fully licensed, so creators can create with confidence and artists remain in control of their music. Music isn't just something you listen to. It's something you feel, wrap your own experiences around, and share. On Hook, you co-create social music content by turning the tracks that move you into something unmistakably you. Remix, build mashups, and add clips & video. All in a few taps with zero learning curve. Streaming lets you hear a song. Hook lets you experience how the world feels it. It's the only social music platform built for music from the ground up: licensed, open, and made so value flows back to the artists and creators who make it all possible. KEY FEATURES: - Feed: Swipe through hooks from the communities, artists, and sounds you love. Fresh music and remixes, personalized to your taste. - Hook Studio: Make your own hook with songs, iconic song moments, clips, or original video. All the power of a recording studio, none of the complexity. - Mashups: Blend two tracks into one. Pair a mic drop with a trick shot. Mix Brazilian funk with Bollywood beats. Flip a classic and crank the bass. - Filters & Effects: Bend the vibe with AI-powered music filters, sound effects, and advanced controls that transform any hook. - Video: Add video to bring your hooks to life and make music you can watch, not just hear. - Jams: Join 300+ active music communities around the genres, artists, songs, and moods you love, and jam with people who feel the way you do. - Explore & Discover: Find trending remixes, top creators, top filters, and the artists breaking on Hook right now. - Your Library: Everything you like, save, and create all in one place. - Challenges & Leaderboard: Enter artist challenges, climb the leaderboard, and get recognized. - Instant Sharing: Share your creations with your Hook communities, one-on-one with friends, or directly to the social and messaging apps where your people already are. HOOK PREMIUM Hook is free to download and use. Hook Premium is an optional subscription that unlocks: - Unlimited prompt-based creations - Watermark-free sharing - Premium filters and advanced controls - Early access to new filters and clips - Verified badge - Ad-free experience If you subscribe to Hook Premium, payment will be charged to your Apple Account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period, and your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription anytime in your App Store Account Settings after purchase. Features and availability may vary by region and device. Privacy Policy: https://hookmusic.com/privacy Terms of Use: https://hookmusic.com/terms-of-use Music is meant to be shared. Download Hook and make the music that shapes culture, with the people and artists you love.
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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.
Not assessed in a Build Kit yet.
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.