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
Cbz Reader
Introducing the ultimate manga, manhwa, and webtoon reader – a light and efficient PDF and CBZ Reader that stands as your go-to choice for immersive comic reading experiences
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included16 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 Cbz Reader: map the core Utilities 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
Add support for additional comic file formats like PDF and CBR.
Assumption to check: Limited file format support for comic files.
Validate with people who use this workflow before building.
Hypothesis 2
Implement cloud sync to save user preferences and reading progress.
Assumption to check: No cloud sync features.
Validate with people who use this workflow before building.
Hypothesis 3
Provide more customization like background color, brightness adjustment, and scrolling modes.
Assumption to check: Basic reading features with no customization options.
Validate with people who use this workflow before building.
Hypothesis 4
Include a search bar in the library to easily find comics.
Assumption to check: No search functionality for comics.
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
Introducing the ultimate manga, manhwa, and webtoon reader – a light and efficient PDF and CBZ Reader that stands as your go-to choice for immersive comic reading experiences. It's not just a reader; it's your gateway to a world of captivating stories, beautifully designed to enhance your manga adventures. Everything is designed to give you the best Manga reading experience, it loads manga immediately, and reading is fluid and comfortable. You can browse through your folders to find and read your comics. *Key Features:* *1. Lightning-Fast Performance:* Our app is optimized for speed and efficiency. No more waiting – manga, manhwa, and webtoons load instantly, providing you with a seamless reading experience. Dive into your favorite stories without any delays. *2. Multi-Format Compatibility:* Whether it's manga, manhwa, webtoons, or comics in formats like CBZ, and PDF, our reader supports them all. Enjoy a vast collection of content from diverse sources, all neatly organized in one place. *3. Intuitive Interface:* Designed with user convenience in mind, our app boasts a sleek and intuitive interface. Easily navigate through your folders to discover and read your comics. The browsing experience is smooth and hassle-free. *4. Manga, Manhwa, and Webtoons:* Immerse yourself in a rich variety of content. From classic manga to the latest manhwa releases and thrilling webtoon series, our app caters to all your reading preferences. Discover new worlds and captivating characters at your fingertips. *5. Comfortable Reading:* Reading is a pleasure with our app. The fluid and comfortable reading experience ensures that you can enjoy every panel, every dialogue, and every emotion portrayed by the artists. Dive into the story and get lost in the captivating visuals. *6. Personalized Library:* Create your own digital library with your favorite manga, manhwa, and webtoons. Organize your collection, bookmark your most cherished series, and pick up right where you left off. Your reading preferences, your way. Experience the joy of reading manga, manhwa, and webtoons like never before. Download our app now and embark on endless adventures through the captivating worlds of comics. Your ultimate reading companion awaits!
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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.
SUGGESTED BUILD STACK
React Native
Expo
react-navigation
expo-file-system
react-native-gesture-handler
zustand
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.
