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.
YOUSICIAN — THE FASTEST WAY TO LEARN GUITAR, BASS & SINGING
Free · 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 Yousician: Learn & Play Guitar: map the core Education workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
YOUSICIAN — THE FASTEST WAY TO LEARN GUITAR, BASS & SINGING Whether you want to learn guitar from scratch, improve your bass technique, or finally learn to sing, Yousician is your personal, anytime music teacher. Millions of musicians worldwide use Yousician to learn guitar, train their voice, and master bass with real-time feedback that listens as you play. LEARN GUITAR — BEGINNER TO INTERMEDIATE & BEYOND - Step-by-step lessons for complete beginners through intermediate players - Master chords, strumming patterns, fingerpicking, lead guitar, and music theory - Train scales, arpeggios, and chord progressions with targeted exercises - Read tabs and sheet music, and explore the full fretboard - Practice on acoustic or electric guitar, in any style - Built-in tuner so you're always in tune and ready to play LEARN REAL SONGS & PLAY ALONG - Learn to play real songs you actually love, not just exercises - Play along to thousands of songs with interactive tabs and real-time feedback - Stay motivated: progress feels like playing, not studying - New songs added every week across rock, pop, blues, and more - From your first easy songs to full guitar solos, there's always a next song to master SKILL-BUILDING FOR EVERY LEVEL - Drills that improve speed, accuracy, and feel - A structured course that grows with you, from first chord to advanced improvisation - Exercises that target your weak spots - Track your progress across 300+ techniques and playing styles LEARN TO SING & DEVELOP YOUR VOICE - Yousician listens and gives instant feedback on your pitch - Vocal exercises for all levels, from first-time singers to pros - Singing lessons that cover technique, warm-ups, and real songs - A virtual singing coach that adapts to your progress - Voice lessons for pop, rock, and everything in between LEARN BASS GUITAR - Bass lessons from beginner to advanced, including slap bass and bass lines - Tutorials covering technique, rhythm, music theory, and the fretboard - Practice songs across all genres with real-time bass feedback 10,000+ LESSONS, EXERCISES & SONGS Over 10,000 guitar, bass, and singing lessons and exercises, all structured into a guided learning path. EVERY MUSICIAN, EVERY LEVEL - Complete beginners picking up a guitar or singing for the first time - Intermediate players drilling scales, arpeggios, and chord progressions - Advanced musicians refining technique and music theory - Self-learners who want structured practice at their own pace WHAT PEOPLE SAY "Modern technology's gift to music education." — Guitar World "A fabulous place to start learning guitar, ukulele or bass." — New York Times ABOUT YOUSICIAN Yousician is the world's leading platform to learn and play music — 20 million monthly users across our award-winning apps. Also check out: GuitarTuna, Ukulele by Yousician, Piano by Yousician. PREMIUM SUBSCRIPTION Subscriptions are annual or monthly. Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless auto-renewal is turned off at least 24 hours before the end of the current period. Account will be charged for renewal within 24 hours prior to the end of the current period. Manage subscriptions and turn off auto-renewal in your App Store account settings after purchase. Any unused portion of a free trial period, if offered, will be forfeited upon purchase of a subscription. · Privacy: yousician.com/privacy-notice · Terms: yousician.com/terms-of-service · Feedback: feedback.yousician.com
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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 song library without paying
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Some users find the interface overwhelming
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: User progress tracking lacks detailed analytics
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Inconsistent audio feedback during practice
Validate with people who use this workflow before building.
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.