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
Nota Ringtones
Nota Ringtones is a completely free app for creating ringtones directly on your iPhone, without the need to connect to a computer
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.4
1,253 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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included15 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 Nota Ringtones: 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
Offer more free ringtones to attract users.
Assumption to check: Limited free ringtones available
Validate with people who use this workflow before building.
Hypothesis 2
Provide clearer information about free and paid features.
Assumption to check: In-app purchases can be confusing
Validate with people who use this workflow before building.
Hypothesis 3
Differentiate with unique features like ringtone customization.
Assumption to check: Many similar apps in the market
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the design for a cleaner user experience.
Assumption to check: User interface can be cluttered
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
Nota Ringtones is a completely free app for creating ringtones directly on your iPhone, without the need to connect to a computer. Easily and quickly create ringtones from your favorite songs and set them for calls, notifications, or alarms. Ease of Use Every iPhone user can effortlessly create their own ringtone. If you have any questions or issues, feel free to contact our support team through the app. We provide personalized assistance completely free of charge. App Benefits Wide Selection of Ringtones: Regular updates with popular, fun, and fresh ringtones and notification sounds. Tutorial Materials: We offer detailed instructions on creating ringtones using GarageBand and iTunes. Visual Guides: Every step of the ringtone creation process is described with illustrations and videos to ensure a 100% success rate. Key Features Extract Audio from Videos: Select a video from your gallery and automatically extract audio to create a ringtone. Precise Trimming: Adjust ringtones with accuracy up to 0.1 seconds. Fade-In and Fade-Out Settings: Support for fade effects ranging from 1 to 5 seconds. Format Conversion: Convert videos and audio files to MP3 and M4R. Special Features Assign unique ringtones to specific contacts. Save and edit your favorite ringtones in the "My Collection" section. Upgrade to Premium: - No Ads and Limits - Unlimited Use of Features - Unlimited Ringtones Subscription Details: Payment will be charged to iTunes Account at confirmation of purchase. Subscription with a 3 days free trial period will automatically renew to a paid subscription. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Account will be charged for renewal within 24 hours prior to the end of the current period at the rate of the selected plan. Subscriptions and auto-renewal may be managed by going to Account Settings after purchase. You can cancel your subscription or free trial in the iTunes settings at least 24-hours before the end of the free trial period. The cancellation will take effect the day after the last day of the current subscription period and you will be downgraded to the free service. Subscription Options: - Weekly: $3.99 - Lifetime: $24.99 For other currencies, the price corresponds to the same tier on the App Store Pricing Matrix. With Nota Ringtones, creating a personalized ringtone has never been easier or more enjoyable! Join us and start customizing your sound today! Privacy Policy: https://nota-ringtones.notion.site/Privacy-Policy-7866dbba82a64f9d87476b2dfa0f44a3 Terms & Conditions: https://nota-ringtones.notion.site/Terms-and-Conditions-109599bb4bd980fe9871d40fe8ac76a5?pvs=74 Support: https://nota-ringtones.notion.site/Support-109599bb4bd9801d86dfdd3fa2e03cb7
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.
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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.
