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
Amazon Music: Songs & Podcasts
We're changing the way you discover and play the music you love
Free · In-app purchases
OVERALL US RANK
#61
Grossing · all categories
REVENUE (Est)
$456K/mo
$257K - $654K
RATING
★ 4.7
3,348,606 ratings · Top 15%
Evidence scope: #61 is the current overall US Grossing chart position. 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
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
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.
JavaScript is required to complete mailbox verification.
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 Amazon Music: Songs & Podcasts: map the core Music workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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 free features or a better free tier.
Assumption to check: Limited free access to songs without a subscription
Validate with people who use this workflow before building.
Hypothesis 2
Implement a cleaner design with better organization.
Assumption to check: User interface can be cluttered
Validate with people who use this workflow before building.
Hypothesis 3
Improve search algorithm for better results.
Assumption to check: Search functionality can be slow and inaccurate
Validate with people who use this workflow before building.
Hypothesis 4
Optimize audio streaming quality settings.
Assumption to check: Inconsistent audio quality on mobile networks
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
We're changing the way you discover and play the music you love. Listen free to music and podcasts with ads—no credit card required. Prime members can enjoy all the music + top podcasts ad-free. Want more benefits? Get 100 million songs on-demand, ad-free top podcasts, and audiobooks from Audible with Amazon Music Unlimited. Included with your Prime membership at no additional cost: • All the music ad-free • The largest catalog of ad-free top podcasts • Discover new music and podcasts based on your likes • Shuffle play any artist, album, or playlist Amazon Music Unlimited: • Unlimited access to 100 million songs • Pick and play any song, ad-free • The most ad-free top podcasts • The largest catalog of audiobooks from Audible • Listen to one audiobook each month • Listen offline • Unlimited skips • Experience our fast-growing collection of spatial audio Or listen to free streaming music, no credit card required: • Thousands of stations and top playlists • Millions of podcast episodes • Discover new music and podcasts based on your likes • No credit card required Import your playlists: • It’s easier than ever to bring your playlists from other music apps to Amazon Music. My Music: • Listen to music you’ve purchased from Amazon – MP3s or AutoRip CDs/Vinyl. Your Amazon purchases are stored for free in the Amazon cloud Apple Watch Features: • Access your favorite music and podcasts right from your wrist • Use your Apple Watch to stream Amazon Music directly or control playback on a compatible iOS device • Play from your library, top recommendations, or search for your favorite Artists and Albums • Download your Playlists and Albums onto your Apple Watch and listen to them in Offline Mode when you're on the go If you subscribe to Amazon Music Unlimited via iTunes where available, payment will be charged to your iTunes Account at confirmation of purchase and your membership will automatically renew monthly unless auto-renewal is turned off at least 24-hours before the end of the then current membership period. Your account will be charged for renewal within 24-hours before the end of each membership period at the rate of your selected plan. You can manage your subscription and turn off auto-renewal anytime by going to My Account or through iTunes. Terms of Use: • https://www.amazon.com/gp/help/customer/display.html?nodeId=201380010
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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
Firebase
React Query
BUILD KIT DIFFICULTY
Expert
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.
