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
ClipTone: Ringtone & Car Sound
Turn any sound into a custom ringtone or your own CarPlay Sound with ClipTone!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
121,265 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 included18 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 ClipTone: Ringtone & Car Sound: 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
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
< Scroll to see more >
App Store description
Turn any sound into a custom ringtone or your own CarPlay Sound with ClipTone! ClipTone makes it easy to extract audio from videos, trim your favorite moments, and set them as ringtones. Now you can also create a CarPlay Sound that plays every time your iPhone connects to CarPlay. Key Features: - Audio Extraction – Pull audio from any video in seconds. - Precise Editing – Trim and fine-tune your clip with ease. - One-Tap Ringtone Setting – Save and apply directly on your iPhone. - CarPlay Sound – Choose from 100+ startup sounds, or use your own, for when CarPlay connects or disconnects. - AI Cover – Generate custom covers in different voices or styles. Subscription Information: Unlock all features with a subscription, available through in-app purchases. A 3-day free trial is offered, after which users can choose between a monthly or yearly plan. - 3-Day Free Trial: Access all features at no cost for 3 days. - Subscription Required: After the free trial, continued access to premium features requires a subscription (auto-renews weekly or yearly). Prices vary by location. Contact & Support: - Email: [email protected] - Join our discord: https://discord.gg/m3SYETvGg9 Terms of Use: https://charmed-snapdragon-05b.notion.site/LICENSED-APPLICATION-END-USER-LICENSE-AGREEMENT-21e02b780450801c9377f8597352f32a?pvs=74 Privacy Policy: https://charmed-snapdragon-05b.notion.site/Privacy-Policy-11f02b780450800b8f73dd12a6b4d9e4
Written user reviews are not shown here. Check current App Store reviews >
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
Expand to support more audio formats and provide clear guidance.
Assumption to check: Users often face limitations in audio file formats supported.
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize AI covers further or select from a library.
Assumption to check: AI-generated covers may not always fit user preferences.
Validate with people who use this workflow before building.
Hypothesis 3
Implement a more enticing free trial or feature showcase.
Assumption to check: The paywall may deter users from trying premium features.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the UI with guided tutorials or a streamlined workflow.
Assumption to check: User interface can be cluttered with too many options.
Validate with people who use this workflow before building.
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
Zustand
React Navigation
expo-av
expo-image-picker
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.
