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 - Receiver
Receiver is an Internet radio with over 40,000 radio stations, more than 25,000 podcasts, and a radio alarm clock.
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
1,104 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's included19 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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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 - Receiver: 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
Expand station database and include user submissions.
Assumption to check: Limited station options compared to other apps
Validate with people who use this workflow before building.
Hypothesis 2
Implement adaptive streaming to minimize buffering.
Assumption to check: Occasional audio buffering issues
Validate with people who use this workflow before building.
Hypothesis 3
Add ability to download favorite stations for offline access.
Assumption to check: No offline listening feature
Validate with people who use this workflow before building.
Hypothesis 4
Enhance UI/UX with more engaging visuals and interactions.
Assumption to check: Basic user interface
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
Receiver is an Internet radio with over 40,000 radio stations, more than 25,000 podcasts, and a radio alarm clock. Features include: + More than 40,000 radio stations + More than 25,000 podcasts + Add your own streams + Search by genre, region, language, sound quality, popularity, etc. + List of channels with high audio quality + Sync favorites with your other devices + Siri shortcuts + HomePod support + CarPlay support + Apple Watch app + Airplay and Chromecast support + Dark Mode + iMessage app to recommend a station + Widget with your favourite stations + Alarm clock (radio, music, sound) with any number of alarms + Sleep Timer + Snooze function + Beautiful analog clock in landscape format + Choose your individual look from 5 different colors + Show song cover art (if available) + Focused on supporting accessibility features such as "Voice Over" for the visually impaired With Receiver you are always informed about the latest news from a wide variety of sources: sports, Bundesliga live, reports, radio plays, news, music, podcasts, reports, travel, weather and much more. Listen to stations like BBC, NPR, ESPN, Bestnetradio, KCRW, Radio Paradise and many more.
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
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.
