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
Streamlets
A standalone radio streaming watch with over 6 years of active development
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
122 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 included17 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 Streamlets: 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 personalized recommendations based on listening history.
Assumption to check: Limited music discovery features
Validate with people who use this workflow before building.
Hypothesis 2
Integrate sharing features for playlists and tracks.
Assumption to check: Lack of social sharing options
Validate with people who use this workflow before building.
Hypothesis 3
Add offline download for user playlists.
Assumption to check: No offline playback
Validate with people who use this workflow before building.
Hypothesis 4
Enhance UI with modern design trends for a better user experience.
Assumption to check: Basic UI design
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
A standalone radio streaming watch with over 6 years of active development. The first and original radio watch app that plays through the watch speaker. Leave your phone at home and browse over 50,000 radio stations from around the world to stream directly on your Apple Watch. * Search for Radio Stations directly on your Apple Watch * Stream live broadcasts over wi-fi or cellular* * Play live streams when you have AirPods or compatible Bluetooth headphones/speaker connected or through the Watch speaker. * Save your favourite stations for easier access. * Browse live radio streams by country or genre/tag or search by the stations name. * Live widget integrations for now playing, favourites and recents. * See popular stations in your country * Runs in the background and integrates with the built in Workouts App. This App uses the superb Community Radio Browser service. If you don't see your favourite radio station in the App, then you can add it at http://www.radio-browser.info. Note: Streaming over cellular when not connected to your phone requires a cellular Apple Watch with an active data plan. For support or feature requests, please visit https://carmody.me
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
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@react-native-async-storage
expo-av
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.
