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.
App Overview
Guitar Note Atlas
Guitar Note Atlas is an interactive map of the guitar designed to help players of all levels better visualize the layout of the notes on the fretboard
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
36 ratings · Top 5%
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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Guitar Note Atlas: 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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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Offer more diverse lessons and user-uploaded content.
Assumption to check: Limited lesson variety and depth
Validate with people who use this workflow before building.
Hypothesis 2
Implement a feature for real-time feedback using audio recognition.
Assumption to check: Lack of real-time feedback during practice
Validate with people who use this workflow before building.
Hypothesis 3
Enhance chord displays with interactive diagrams and animations.
Assumption to check: Insufficient chord visualization
Validate with people who use this workflow before building.
Hypothesis 4
Add social features for users to share progress and ask for help.
Assumption to check: No community features
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Guitar Note Atlas is an interactive map of the guitar designed to help players of all levels better visualize the layout of the notes on the fretboard. It serves as a perfect practice aid for learning the geography of the guitar as well as understanding the modes of the Major Scale, Melodic Minor, Harmonic Minor, and Harmonic Major. Flexibility and interaction allows for ultimate creativity. You can select any combination of notes you want to see right on the main screen, or pick a scale from the drop-down menu. Switch quickly between all 7 positions or tap the diagram to zoom out and view the entire fretboard at once. (The iPad version shows both views simultaneously.) Features: - Bass Guitar Mode - Left Hand Mode - Change keys - Native iPad version (buy once and use on all devices) - Flip diagram upside down - Show/Hide scale degree numbers -Show/Hide colored-in anchor frets Included in the app is a tutorial to get you started (both right- and left-handed versions).
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
Axios
React Navigation
React Native Video
Shadcn/ui
BUILD KIT DIFFICULTY
Starter
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.
