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
Matter: Reading App
Finally, a better reading app
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
1,230 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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included19 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.
JavaScript is required to complete mailbox verification.
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 Matter: Reading App: map the core News workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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 full offline access to saved articles.
Assumption to check: Limited offline reading capabilities.
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize notification preferences.
Assumption to check: Push notifications can be overwhelming.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce customizable text size settings for accessibility.
Assumption to check: No text size adjustment options.
Validate with people who use this workflow before building.
Hypothesis 4
Add options to share articles on various social platforms.
Assumption to check: Lack of social sharing features.
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
Finally, a better reading app. The internet is full of things you want to read – articles, newsletters, Twitter threads, PDFs. Matter brings them together in one place and gives you modern tools, like natural text-to-speech and fluid highlighting, to help you read more comfortably and effectively. "Matter improves vastly on earlier read-later apps like Pocket and Instapaper" – The Wall Street Journal Save anything: - Save full articles if you're within the paywall (eg. Bloomberg, NYT, WSJ) - Podcast transcriptions & synced playback - Save PDFs and YouTube Read across devices, including Kindle: - iPhone, iPad, Web - Send any article to Kindle in 2-taps Unified inbox for your subscriptions: - Sync your newsletters by connecting Gmail - Follow individual writers for their latest posts - Add any RSS feed The most elegant reading experience: - Best-in-class article parsing + readability - Available offline by default - Gorgeous night mode - Human-like text-to-speech - Fluid highlighting and note-taking Export your knowledge: - Sync your highlights to Notion, Obsidian, Roam, Readwise, and others Matter offers a free service and a Premium service. The free version of Matter includes: - Uncapped read-later library - Mobile & web extensions to save all types of content - Best-in-class parsing and readability - Unlimited tags - Full-text search - Customizable themes and fonts In addition to the free features, Matter Premium offers: - HD text-to-speech for all your articles - Seamless AI Co-Reader - Sync your newsletters, subscribe to writers, and add RSS feeds - Unlimited highlighting, note-taking, and integrations - Send to Kindle Payment for Matter Premium will be charged to your iTunes Account when you subscribe. Annual and monthly subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. Auto-renewal may be turned off at any time by going to your settings in the iTunes Store after purchase. Manage your Matter Premium subscription by going to Matter's Settings page. Terms of Use: https://hq.getmatter.com/terms Privacy Policy: https://hq.getmatter.com/privacy
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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
Axios
Redux Toolkit
React Navigation
Shadcn/ui
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.
