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
ABRSM Music Theory Trainer
ABRSM Music Theory Trainer contains over 6,000 specially-written questions designed to test and challenge your music theory knowledge
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.7
10 ratings · Top 50%
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's included17 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 ABRSM Music Theory Trainer: 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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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
Incorporate gamification elements like quizzes and challenges.
Assumption to check: Limited interactive content and exercises
Validate with people who use this workflow before building.
Hypothesis 2
Design a more intuitive navigation and layout.
Assumption to check: User interface is not user-friendly
Validate with people who use this workflow before building.
Hypothesis 3
Implement robust progress tracking with visual feedback.
Assumption to check: Lack of progress tracking features
Validate with people who use this workflow before building.
Hypothesis 4
Enable offline downloads for lessons and practice exercises.
Assumption to check: No offline access to lessons
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
ABRSM Music Theory Trainer contains over 6,000 specially-written questions designed to test and challenge your music theory knowledge. Start by learning the basics then test yourself and see if you can get a perfect score. Every time you complete a round, you unlock the next level. Watch your music theory knowledge build up in these fun and addictive challenges and become a music theory expert! In the app, you can learn about: The musical stave, pitches, clefs Scales, keys and chords Rhythm and time signatures Musical terminology and signs Voices and instruments And much, much more! Strong foundations in musical knowledge and understanding are essential for developing well-rounded and confident musicians. That’s why we believe in the importance of music theory. Hey, phone users! Music notation is complex and phone screens are small. This app is best viewed on an iPad, but there is still a lot you can learn and enjoy if you’re using the app on a smaller phone. Make sure you check out the preview screenshots in the App Store to see how the app will look on your device.
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
Supabase
@react-navigation/native
react-native-chart-kit
expo-notifications
BUILD KIT DIFFICULTY
Intermediate
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.
