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
RSS-Filter – News Feed Reader
A clutter-free reader app with easy-to-use but advanced filtering options, including a blacklist, a whitelist, and a graylist.
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
2 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 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 RSS-Filter – News Feed Reader: 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
Allow users to customize filters and sources more extensively.
Assumption to check: Limited customization options for news sources
Validate with people who use this workflow before building.
Hypothesis 2
Implement offline reading capabilities for saved articles.
Assumption to check: Lack of offline reading feature
Validate with people who use this workflow before building.
Hypothesis 3
Add text-to-speech functionality for hands-free article listening.
Assumption to check: No text-to-speech for articles
Validate with people who use this workflow before building.
Hypothesis 4
Enhance search with advanced filters and suggestions.
Assumption to check: Limited 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
A clutter-free reader app with easy-to-use but advanced filtering options, including a blacklist, a whitelist, and a graylist. You control what reaches you. Miss less while wasting less time. No ads. No account needed. No data sharing. No subscriptions. For iPhone, iPad and Mac. With iCloud syncing. Effective Filtering: Add terms quickly to a filter list by selecting text. You can manage entire topics by selecting parts of a website link, such as '/crosswords/'. Articles containing a blacklisted term are automatically trashed. If no whitelisted term is present, articles containing a graylisted term are also automatically trashed. You can review the trash occasionally to verify your settings. Transparent And Fair Purchase Model: Start with up to 100 filter entries, then unlock unlimited filters with a one-time in-app purchase (5 USD)—no subscriptions or recurring fees. This lets you scale up to thousands of filter terms effortlessly.
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
Supabase
Zustand
React Navigation
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.
