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
CastFlow
CastFlow is a family-friendly home media hub that spans iPhone, iPad, Mac and Apple TV
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.0
8 ratings · Below Average
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 included15 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 CastFlow: 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
Focus on robust testing and stability.
Assumption to check: Poor ratings due to bugs and crashes
Validate with people who use this workflow before building.
Hypothesis 2
Expand compatibility and provide user guides.
Assumption to check: Limited support for DLNA devices
Validate with people who use this workflow before building.
Hypothesis 3
Implement offline downloads for media.
Assumption to check: No offline playback option
Validate with people who use this workflow before building.
Hypothesis 4
Redesign UI for clarity and ease of use.
Assumption to check: Interface is not user-friendly
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
CastFlow is a family-friendly home media hub that spans iPhone, iPad, Mac and Apple TV. Cast from your phone, stream IPTV, browse Jellyfin, or open files on your NAS — all on your own network, no account needed. Cast anything to the living room Turn CastFlow into a DLNA / UPnP receiver. Push a video, a song, or a photo from any phone, tablet, PC or NAS with one tap and it lands on the big screen. IPTV that feels like TV Import M3U playlists or Xtream Codes accounts. Browse categories, follow the EPG, and enjoy time‑shifted playback in a clean, native player. Jellyfin & Emby, feel‑native Sign in once and get Continue Watching, Recently Added, seasons, episodes, and multi‑audio / multi‑subtitle tracks. It behaves like a first‑party client, not a browser wrapper. SMB & WebDAV Connect directly to your NAS, home server, or WebDAV drive. Browse folders, preview posters, and play files without preloading or transcoding. Danmaku overlay Turn on scrolling live‑comment overlays for supported casting sources — perfect for anime nights and shared watch parties. MPV‑powered playback Hardware decoding for H.264, HEVC and AV1. Full support for SRT, ASS/SSA and PGS subtitles, external audio tracks, per‑track speed and pitch control. Continue Watching, everywhere Resume points sync across sources and devices, so you can jump from the couch to the bedroom without losing your spot. Local‑first, private by default No account. No cloud database. No tracking. CastFlow does not upload your library metadata anywhere. Your media stays on your local network. One app across the family iPhone, iPad, Mac and Apple TV — add a source once and it's ready on every device. CastFlow adapts to each screen: a receiver on the TV, a browser on your Mac, a remote in your pocket. Made for – NAS owners who want their library on every screen – IPTV fans who want a clean native player instead of a browser tab – Cord‑cutters running Jellyfin or Emby at home – Anyone who wants phone, computer and NAS content to just appear on the Apple TV Add a source, hit play, and let the media flow. Support: https://tinuv.me/castflow/ Privacy: https://tinuv.me/castflow/privacy.html
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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expo-av
zustand
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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.
