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
BookWalker: Manga & Novels
Dive into thousands of officially licensed stories, curated by fans, for fans.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 1.7
140 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 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/
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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 BookWalker: Manga & Novels: map the core Books workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Dive into thousands of officially licensed stories, curated by fans, for fans. Welcome to BookWalker, the premier digital bookstore for manga, light novels, and manhwa. Whether you’re a lifelong collector or just starting your first series, we’ve saved you a spot on the couch. Explore a massive library of over 80,000 titles from the world’s top publishers—all in one easy-to-use app. Why Read with BookWalker? 1. A World of Stories at Your Fingertips Browse an ever-growing catalog of 80,000+ titles. From the biggest hits to hidden indie gems, we bring you the best of: - Manga & Manhwa: Action, Romance, Isekai, Horror, and Slice of Life. - Light Novels: The latest volumes of your favorite series, often available here first. - Audiobooks: Enjoy your stories on the go with our expanding audio library. 2. Supporting the Creators You Love We are a KADOKAWA Group company. Every book you buy on BookWalker is officially licensed, meaning your support goes directly to the authors, artists, and publishers who make these worlds possible. 3. Exclusive Digital Bonuses We love a good collector’s item. Many of our titles come with exclusive digital DLC, such as special illustrations, short stories, and wallpapers you won't find anywhere else. 4. Save While You Read Building a library shouldn't break the bank. Enjoy regular promotions, deep discounts, and "Coin" rewards. 5. A Personalized Reading Experience Our app is designed for comfort and customization: - Offline Reading: Download your books and read anywhere—no Wi-Fi needed. - Tailored Reader: Adjust brightness, text size (for Light Novels), and page-turning styles to suit your vibe. The Best Publishers in One Place We partner with the industry’s finest to ensure you have access to the latest releases: - Seven Seas Entertainment - Yen Press - Kodansha - J-Novel Club - VIZ Media - Square Enix ...and many more! Join Our Community BookWalker is more than just an app; it’s a gateway to new cultures, voices, and experiences. We are a global community of otaku who value great storytelling. Whether you're into timeless classics or the newest "simulpub" releases, you’ll find it here. Ready to start your next adventure? Download the BookWalker app and start reading today! Follow us for updates and giveaways: Instagram: https://www.instagram.com/bookwalker_gl/ X: https://x.com/BOOKWALKER_GL BlueSky: https://bsky.app/profile/bookwalker-gl.bsky.social Website: https://bookwalker.com
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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 exclusive titles or community-driven recommendations.
Assumption to check: Limited book selection compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement a cleaner, more modern UI with intuitive navigation.
Assumption to check: Poor user interface and experience
Validate with people who use this workflow before building.
Hypothesis 3
Prioritize stability and performance for a smoother user experience.
Assumption to check: Frequent app crashes or bugs
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the purchasing process with clear pricing and options.
Assumption to check: Unclear purchase process
Validate with people who use this workflow before building.
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
axios
react-native-paper
BUILD KIT DIFFICULTY
Expert
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.
