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
Modcast - Podcast Player
Modcast – Simple
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.7
3 ratings · Top 50%
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/
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 Modcast - Podcast Player: 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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Continue in Rork >
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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 podcast discovery features
Validate with people who use this workflow before building.
Hypothesis 2
Enhance player controls with larger buttons and visual feedback.
Assumption to check: Audio playback controls are not intuitive
Validate with people who use this workflow before building.
Hypothesis 3
Add offline downloads for episodes.
Assumption to check: Lack of offline listening options
Validate with people who use this workflow before building.
Hypothesis 4
Improve search with filters for genre, popularity, and duration.
Assumption to check: Poor search functionality
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
Modcast – Simple. Powerful. Personal. Modcast is a modern podcast player built for people who value clean design, powerful features, and effortless listening. Whether you're into Audio podcasts, Video Podcast, or both—Modcast makes it easy to subscribe, stream, organize, and enjoy your favorite content anywhere. Audio & Video Podcasts Enjoy a seamless experience with full support for both traditional audio podcasts and video episodes. Watch or listen the way you want. Smart Bookmarks Never lose your place or forget an important moment again. Instantly bookmark timestamps in any episode and return to them anytime with organized bookmark management. Sleep Timer Flexible Views Smart Collections Subscription Management Take control of your library. Subscribe to your favorite shows, organize them with ease, and get automatic updates—all without the clutter. AirPlay Support Send podcasts to your speakers or TV in one tap. Enjoy hands-free listening or big-screen viewing with AirPlay integration. Designed for Simplicity Modcast is clean, fast, and distraction-free. No confusing menus. No unnecessary bloat. Just intuitive design and features that make sense. Why You’ll Love Modcast Audio + video podcast streaming Bookmark episodes & save timestamps Easy subscription management AirPlay for speakers & TV Polished, modern interface Built for speed and simplicity Whether you're learning something new, staying informed, or getting lost in a great story—Modcast gives you a smarter way to listen. Download Modcast today and discover the podcast app that finally feels right.
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
Redux
Axios
React Navigation
React Native Sound
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.
