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
Radio App
Listen to any radio station with the best Radio App for free!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
18,139 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.
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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 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.
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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 Radio App: 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
Implement offline caching for favorite stations.
Assumption to check: Limited offline functionality due to streaming only
Validate with people who use this workflow before building.
Hypothesis 2
Offer an ad-free subscription tier.
Assumption to check: Ads may disrupt user experience
Validate with people who use this workflow before building.
Hypothesis 3
Optimize search with better algorithms.
Assumption to check: Search functionality can be slow
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize station lists and UI themes.
Assumption to check: Limited customization for users
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
Listen to any radio station with the best Radio App for free! Radio App offers the best experience in listening to radio stations form all around the world, and also finding stations from all over the world. Find more than 30,000 radio stations from the USA and more than 90.000 from the rest of the world. Our team continuously updates and adds new radio stations. With Radio App you will enjoy the best streaming quality and plenty of available stations in the most reliable radio tuner. Download Radio App for free today! Available on iPhone, iPad and Apple Watch. • Instant access to your preferred radio stations no matter where you are in the world • Stay updated with the latest news, sports, music and more. • Discover the best radio stations. • Simple and intuitive design: start listening to your favorite stations as soon as you install the app. It’s very easy to use and no login is required. • Listen in the background, with your phone locked or when using other apps. • Efficient search: find the station you are looking for. • Save your favorite stations with just one tap. With Radio App, you can easily access all the top radio stations in the US, including: NPR, Mega 97.9, Fox Sports, KIRN, WNYC, WHUR, La Raza, Que Buena, K-LOVE, WAMU, Bloomberg, BBC, ESPN Radio, Majic, Talk News, Classic Rock, CBS Sports, Smooth Radio, Jazz 91.9, and many more FM, AM and web stations! Listen to free live FM AM and web radio stations. Discover any genre: news, talk, sports, rock, pop, jazz, classic, dance and much more. Have any questions or feedback? We want to create the best radio app in US! You can help by reporting bugs and requesting features by emailing [email protected] This software uses code of FFmpeg (ffmpeg.org) licensed under the LGPLv2.1 (www.gnu.org/licenses/old-licenses/lgpl-2.1.html). Privacy policy: https://bit.ly/rafiki-privacy-policy Terms of use: https://bit.ly/rafiki-terms-of-service Product names, logos, brands, and other trademarks featured or referred to within this profile and the Radio App app are the property of their respective trademark holders. These trademark holders are not affiliated with Radio App or our services.
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
React Navigation
Axios
Firebase
Redux
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.
