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
Mezquite Diatonic Accordion
A FREE Educational and Fun App to learn to play the Diatonic Button Accordion.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
4,295 ratings · Top 15%
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.
Build your own version
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 included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 Mezquite Diatonic Accordion: 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
Regularly update song library with user submissions.
Assumption to check: Limited song variety and updates
Validate with people who use this workflow before building.
Hypothesis 2
Implement offline download feature for songs.
Assumption to check: No offline access to songs
Validate with people who use this workflow before building.
Hypothesis 3
Add sharing options for songs and user playlists.
Assumption to check: Lack of social sharing features
Validate with people who use this workflow before building.
Hypothesis 4
Simplify UI and improve navigation experience.
Assumption to check: User interface can feel cluttered
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
A FREE Educational and Fun App to learn to play the Diatonic Button Accordion. • Genuine Accordion Sounds Professionally Recorded from a Leading Brand Accordion • Super-responsive, plays like a real accordion! • 4 Different Accordion Sounds: Deluxe, Norteño, Texano & Vallenato • 6 Complete Tunings GCF, EAD, FBbEb, ADG, BbEbAb and F#BE • 5 Register sounds! • 34 Buttons • Buttons 'Light up' to show you which notes to play! • Teaches which finger to use for EACH note • Learn scales • Learn songs • AUTO mode: Tap anywhere to play song! • Advance or Rewind song anytime • Automatic Tuning change for each song • Different options to display button notes on different systems • New songs added every Friday! #MezquiteFriday • Ability to CONVERT songs to another tuning • Ability to TRANSPOSE song • Settings are stored • Song Request built-in • Background audio enabled: play along with your favorite music player on the background • Beautiful interface • iPhone, iPad and iPad Pro-Ready! • Best of all: FREE!! For best experience please disable Gestures. Go to Settings > General > Gestures (OFF) If you have No Sound please check that the volume is up and that your device is NOT in silent/vibrate mode. Thank you for downloading and have fun! Questions, Comments and Feedback are welcome: [email protected] Made in Mexico
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 Navigation
Expo Audio
Axios
Zustand
React Native
Shadcn/UI
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.
