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
Susu Player
Susu Player is an offline music player built for the audio collection you already own.
$6.99
PRICE
$6.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included16 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
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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.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Susu Player is an offline music player built for the audio collection you already own. IMPORTANT: Susu Player does not include, sell, stream, or provide any music, and it does not download songs. You choose and import compatible audio files from Files or iCloud Drive. You are responsible for ensuring that you have the right to use the audio files you import. BUILD YOUR PERSONAL LIBRARY Import individual audio files or complete folders. Susu Player respects organized Artist and Album folders while also reading embedded metadata when available. Supported formats include MP3, M4A, AAC, WAV, AIFF, and FLAC. ORGANIZE IT YOUR WAY • Browse by songs, albums, and artists • Create and manage your own playlists • Mark songs as favorites • View recently played and top songs • Customize album artwork with your own photos • Reimport folders to add or update music OFFLINE PLAYBACK Listen without a subscription, account, or internet connection after your files are imported. Control playback from the full-screen player, mini player, Lock Screen, Control Center, compatible widgets, and CarPlay. KARAOKE MODE Prepare compatible tracks for karaoke by reducing the lead vocal. Vocal separation is processed directly on your device. The required processing model is downloaded only after you choose to use the feature. OPTIONAL ICLOUD BACKUP Back up playlists, favorites, listening history, artwork, and other library customizations to your private iCloud database. Audio-file backup is a separate option, so you decide whether your music files are included. Your imported audio remains on your device unless you choose to include it in an iCloud backup. Susu Player is designed for people who want a focused, customizable, and private way to enjoy their own music collection.
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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
BUILD KIT DIFFICULTY
Advanced
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.
