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
iSTB
iSTB allows you to watch IPTV from MAC address based providers which use Stalker Middleware, providers using the Xtream Codes API and M3U playlists.
$14.99 · In-app purchases
PRICE
$14.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
1,746 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 included18 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 iSTB: 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
Incorporate a broader range of content and partnerships.
Assumption to check: Limited content library compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Optimize streaming for better performance and responsiveness.
Assumption to check: Occasional streaming issues, buffering during peak times.
Validate with people who use this workflow before building.
Hypothesis 3
Redesign for cleaner navigation and improved user experience.
Assumption to check: User interface can feel cluttered.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify subscription options and provide clearer user guidance.
Assumption to check: Subscription management can be confusing.
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
iSTB allows you to watch IPTV from MAC address based providers which use Stalker Middleware, providers using the Xtream Codes API and M3U playlists. **Please use the iSTB Lite app to check if your provider is supported** **Some providers are not supported** Features: - Add/remove unlimited portals - Connect to multiple portals at once with profile groups - Search genres by name - Search channels by name - Add channels to a favorites list - Full electronic programming guide or EPG (dependent on your provider) - View & download VOD content (dependent on your provider) - Catch up on past programs (dependent on your provider) - Watch VOD with subtitles from OpenSubtitles - Resuming of VOD and catch up content - Play audio in background - Watch multiple streams at once with Multi View (dependent on your provider) - Play picture in picture (supported devices) - Cast to TV (May not work with all providers. Requires VLC app to be installed and a Chromecast.) - Watch content in portrait or landscape - Dark theme - And more! Please note: - This app works with MAC address & Xtream Codes based IPTV providers and M3U playlists only. Download the iSTB Lite app to check if your provider is supported. - You will need a valid subscription with an IPTV provider to watch content. This app does not offer any video or audio content itself. - All content is provided by your IPTV provider. If you have any questions or problems regarding the content or your subscription, please contact your IPTV provider directly. - You will need an active internet connection to watch content. Data charges may apply. Please check with your internet provider directly. - By using this app, you acknowledge and agree that you have the legal right to access and view the content provided by you. The app does not host, store, or distribute any copyrighted content. Users are solely responsible for ensuring that they comply with applicable laws, regulations, and copyright agreements when accessing and streaming content. The app and its developers assume no liability for any misuse of the service. If you do not have the necessary rights to access certain content, you must refrain from using the app for such purposes.
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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.
