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
Chime - Turn Noise Into Music
Chime — Turn Noise Into Music
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
15 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
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 Chime - Turn Noise Into Music: 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
Incorporate more advanced editing tools like multi-track editing and MIDI support.
Assumption to check: Limited sound editing features compared to full DAWs
Validate with people who use this workflow before building.
Hypothesis 2
Implement a guided tutorial or onboarding process to ease new users into the app.
Assumption to check: Can be difficult to navigate for new users
Validate with people who use this workflow before building.
Hypothesis 3
Add noise cancellation features to improve recording quality.
Assumption to check: Inconsistent audio quality when recording in noisy environments
Validate with people who use this workflow before building.
Hypothesis 4
Create social sharing capabilities and collaboration tools for users.
Assumption to check: Limited community features for sharing and collaboration
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
Chime — Turn Noise Into Music Ever wondered what sound feels like? Chime transforms raw noise into rich, playable textures the moment your fingers hit the screen. No text labels. Just discovery. Built for beginners and pros alike. Built for anyone curious about music. Just sound, waiting to be shaped. Every swipe reveals new tones, movement, and color you didn’t expect. On iPhone, tap and explore a single immersive canvas. iPad splits into three voices — layer or jam. Play, listen, learn — Chime is an instant lesson in sound. Powered by Sketch Audio’s custom engine, Chime is fast, responsive, and deeply expressive. What people are saying “Loving it so far — truly anybody could use this regardless of musical ability. It’s fun and simple yet immersive. I’ll definitely be losing hours messing around with this one in the future.” - @benspremulli “So satisfying to use.” - @beabrabante "This is a truly special synth app! I can't wait to see what other people make with this." - @peninsularepairs Highlights • Play sound through touch — icon-only interface invites discovery • 49 presets ready to spark ideas, plus unlimited user saves. • Wide sound palette — from shimmering pads and glassy plucks to gritty drones, textured noise hits, bass pulses, and percussive glitches • Interactive filter with three modes (low-, high-, band-pass) • Up to three layers on iPad for instant splits or stacks • AUv3 & standalone — drop Chime into any iOS DAW • MIDI input for external controllers • Session auto-save so ideas never disappear Chime is ready when you are. Download today.
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
Supabase
Zustand
react-navigation
expo-av
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.
