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 guitar apps teach songs
$9.99 · 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 Sisco's Guitar Trainer AR: 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: Limited feedback on user progress and performance tracking.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Stiff competition from other music learning apps.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Potential user confusion with AR features.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: High subscription cost compared to competitors.
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 guitar apps teach songs. This app teaches the neck. Sisco’s Guitar Fretboard Trainer is a modern guitar learning system designed to help players understand scales, fretboard movement, modes, improvisation, and soloing in a faster and more intuitive way. Instead of relying on static diagrams and endless memorization, the app trains players to recognize movable patterns and understand how those shapes connect across the guitar. The system focuses on pentatonic positions, diatonic modes, roots, chord degrees, and visual fretboard recognition to help guitarists develop stronger improvisation skills and real fretboard confidence. By simplifying the learning process into visual movement and pattern memory, players naturally begin understanding how scales function in different keys and musical situations. Interactive training modes help reinforce scale recognition, tonal centers, root movement, and harmonic relationships while building muscle memory through repetition and practice. The experience is intentionally clean and distraction-free so players can focus on developing instinctive fretboard awareness instead of relying on note memorization alone. The app also introduces an original augmented reality training system that allows players to physically finger virtual scale shapes onscreen using live hand interaction. This creates a unique connection between visual learning, finger memory, and physical playing technique unlike traditional guitar lesson apps. Whether you play blues, rock, jazz, metal, acoustic, lead guitar, or modern improvisation styles, Sisco’s Guitar Fretboard Trainer offers a fresh and highly visual approach to learning guitar scales, fretboard patterns, and soloing.
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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.