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
Downcast
A powerful, complete, and easy to use podcast player that will help you manage and listen to podcasts the way you want to.
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.3
2,665 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 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 Downcast: map the core News 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 advanced search and personalized recommendations.
Assumption to check: Limited podcast discovery options
Validate with people who use this workflow before building.
Hypothesis 2
Enhance playback controls with speed adjustments and sleep timers.
Assumption to check: Inconsistent playback features
Validate with people who use this workflow before building.
Hypothesis 3
Allow for better podcast caching and offline listening.
Assumption to check: Poor offline capabilities
Validate with people who use this workflow before building.
Hypothesis 4
Simplify UI and improve navigation for easier access to features.
Assumption to check: Cluttered 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
A powerful, complete, and easy to use podcast player that will help you manage and listen to podcasts the way you want to. Now with CarPlay support! "Downcast: Probably The Best Podcast Downloader for iPad and iPhone" - Wired Gadget Lab Subscription Features • Search, subscribe to and download audio and video podcasts of any size • Manually subscribe to podcasts via URL • Download podcasts automatically • Continue podcast downloads in the background* • Browse and download older podcast episodes • Auto-refresh podcast feeds • Settings for auto-download and episode retention • Import and export podcast feeds via OPML • Import supported audio/video media files • Support for password-protected podcasts • Create and edit "smart" playlists • View podcast details and episode show notes • Rename podcast titles iCloud Syncing with other iOS devices or Macs** • Podcast subscriptions • Playlists • Settings • Episode information Playback Features • Video and audio AirPlay support • .5x, 1x, 1.25x, 1.5x, 2x, 2.25x, 2.5x and 3x speed playback • Chapters support for enhanced podcasts • Stream episodes without downloading • Playback control from external devices • Bluetooth devices • Headphone remote controls • Devices connected via Lightning/dock connector • View embedded images in podcast episodes • Gesture support • Sleep timer • Google Cast™ Ready ----------------------------------------- For support, please search our support site at http://support.downcastapp.com or email us at [email protected]! For the latest information about Downcast, please follow @downcastapp on Twitter! * Per iOS restrictions ** iCloud syncing with Macs requires Downcast for Mac, which is a separate purchase from the Mac App Store
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
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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.
