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
WEBTOON: Manga, Comics, Manhwa
Join the largest manga, comics, and manhwa community in the world with millions of fans and creators on WEBTOON!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
516,666 ratings · Top 5%
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 included17 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 WEBTOON: Manga, Comics, Manhwa: 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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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
Join the largest manga, comics, and manhwa community in the world with millions of fans and creators on WEBTOON! Why you'll love WEBTOON: - Access millions of episodes for FREE! - Explore the world’s largest selection of webcomics spanning diverse genres like action, romance, thriller and everything in between. - Now you can read or watch fan-favorite stories like never before with Video Episodes - anytime, anywhere, free! - Find your next obsession in the Watch tab, where you can explore series highlights and the latest video episodes. - Enjoy global hits like Lore Olympus, The Mafia Nanny, Omniscient Reader, School Bus Graveyard and The Remarried Empress. - Read familiar favorites and graphic novels like Fullmetal Alchemist, Batman: Wayne Family Adventures, Godzilla, Avatar: The Last Airbender and From Old Country Bumpkin to Master Swordsman. - Home to the original webcomics behind the TV and film adaptations of Tower of God, True Beauty, Sweet Home and Marry My Husband streaming on Netflix, Disney+, and Crunchyroll and more. - Engage with a thriving community of fellow enthusiasts and creators by subscribing to your favorite series and making your voice heard through the comments section! - Unlock premium content like full series access and early episode access by buying Coins Are you a storyteller at heart? Use our CANVAS platform to publish your own webcomics and reach a global audience. Share your story and build your own community. WEBTOON is where you find your fandom. Website: https://www.webtoons.com/en/ Terms of Use: https://www.webtoons.com/en/terms Check out WEBTOON on socials! Instagram: https://www.instagram.com/webtoonofficial TikTok: https://www.tiktok.com/@webtoonofficial YouTube: https://www.youtube.com/webtoonofficial X: https://x.com/webtoonofficial
Written user reviews are not shown here. Check current App Store reviews >
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 better swipe gestures and progress indicators.
Assumption to check: Difficulty in navigating long comic chapters
Validate with people who use this workflow before building.
Hypothesis 2
Enable offline downloads for favorite comics.
Assumption to check: Limited offline reading options
Validate with people who use this workflow before building.
Hypothesis 3
Design a cleaner, more organized layout for browsing.
Assumption to check: User interface can be cluttered
Validate with people who use this workflow before building.
Hypothesis 4
Ensure real-time sync of user favorites and reading progress.
Assumption to check: Inconsistent syncing of favorites across devices
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
Supabase
Axios
react-navigation
react-native-gesture-handler
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.
