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
Custom Alert Tones & Sounds
Choose from over 1,000 *brand new* alert tones PLUS make your own alert tones from your favorite songs!
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.0
495 ratings · Top 30%
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'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.
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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 Custom Alert Tones & Sounds: map the core Entertainment 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
Offer a wider variety of tones and regular updates.
Assumption to check: Limited tone selection can frustrate users.
Validate with people who use this workflow before building.
Hypothesis 2
Provide clearer value propositions and better user education.
Assumption to check: In-app purchase prompts can be intrusive.
Validate with people who use this workflow before building.
Hypothesis 3
Implement better organization features, such as categories or folders.
Assumption to check: Users may find it hard to manage downloaded tones.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to upload their own tones and share with others.
Assumption to check: Lack of user-generated content limits engagement.
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
Choose from over 1,000 *brand new* alert tones PLUS make your own alert tones from your favorite songs! Unlimited Downloads. Perfect for New Text Tones, New Email Tones, New Voicemail tones. Sick of the same boring tones and sounds on your phone? Add some personality to your iPhone. CUSTOMIZE ANY OF THE FOLLOWING SOUNDS * Ringtone * Text Tone * New voicemail * New email * Sent email * Tweet * Facebook post * Calendar alert * Reminder alert * Airdrop * Wake-up call TONS TO CHOOSE FROM Music, relaxing tones, sound effects, funny sounds, emergency sirens, pets and animals, explosions, lasers, video games, classical music, gross tones, crazy men and women, and tons more! UNLIMITED DOWNLOADS * Download this app and you can download as many tones as you want. * Share with friends. * Stop paying for each tone. Save money SET A CUSTOM TONE FOR EACH FRIEND Set a unique text tone for each friend! Hear who texted you! Perfect for when your phone is in your pocket or while you are driving. NEW! Now you can also make your own ringtones or alert tones * Make ringtones or alert tones from your favorite songs * Record ringtones also! * Create extra long 40 second ringtones * HD Audio quality * Make up to 3 ringtones. Upgrade to make unlimited number of ringtones. Crafted with detail from the #1 Ringtone and Alert Tone Developer on AppStore since 2009.
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
Expo
Zustand
Axios
React Navigation
expo-av
BUILD KIT DIFFICULTY
Intermediate
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.
