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
Crate for Plex
Your Plex music library, finally given the iOS music player it deserves.
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
3 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.
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 included18 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 Crate for Plex: 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
Enhance offline playback and downloads.
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 2
Add sharing options for playlists and songs.
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Implement user-based music recommendations.
Assumption to check: Lack of personalized recommendations
Validate with people who use this workflow before building.
Hypothesis 4
Integrate a lyrics feature synced to playback.
Assumption to check: No lyrics display
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
Your Plex music library, finally given the iOS music player it deserves. Crate is a native, unofficial music player for your Plex Media Server, built for iPhone, iPad, Mac, Apple Watch, and CarPlay. Pay once. No subscription. No ads. No tracking. Just your music, played beautifully. ON IPHONE - Browse your entire library — albums, artists, playlists - Now Playing reimagined with crossfade, queue, and hearts - Discover view to rediscover albums you'd forgotten you loved - Download albums for offline listening - Smart caching keeps recently-played tracks ready offline - Light and dark modes that actually look like iOS ON APPLE WATCH - A real watchOS app — browse, download, and play from your wrist - Doubles as a remote when your iPhone is the one playing - Download albums directly to your watch - Phone-optional playback with AirPods THE FUNDAMENTALS, DONE RIGHT - Crossfade between tracks - Shuffle with no repeats - Hearts to track what you love - Queue management you can actually use - Lossless playback on iPhone (Apple Watch auto-transcodes for compatibility) WHAT'S NOT INSIDE - No subscription - No ads - No tracking - No login wall to a service that isn't yours Crate connects directly to your own Plex Media Server. Your music. Your server. Your player. REQUIREMENTS Crate requires a Plex Media Server with a music library and a free Plex account. Plex Pass is not required. Crate is an unofficial third-party application and is not made by, endorsed by, or affiliated with Plex Inc.
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
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expo-router
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.
