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
Funovel – Reading Good Books
Funovel — An app that provides you with all kinds of Good Novels！
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
2,358 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 included18 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 Funovel – Reading Good Books: 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
Funovel — An app that provides you with all kinds of Good Novels！ *Find Books For You: Tell us the books you’re interested in, and we’ll do our best to find the original titles and similar books for you. *Book Genres: Romance, Werewolf, Fantasy, Billionaire, Mystery, Sci-fi, Fan-fic and Western * Popular Novel Collections: We regularly update the popular books trending Online. Your next favorite read is on Funovel! Funovel offers a vast collection of popular novels, and you can enjoy reading them all without ever needing to purchase physical copies! - All-new featured layouts: Our new staggered layout offers a refreshing, modern visual experience, making book discovery more intuitive and enjoyable. - Satisfy your reading cravings: Tell us your favorite novels or genres, and we’ll find matching books for you. This way, you’ll always have fresh reads that perfectly match your taste. - Fast Daily Updates: Popular web novels are updated every day. Our professional team ensures fast and high-quality updates daily, so your reading never stops. - Immersive Design: Enjoy a clean and elegant reading interface designed for smooth, distraction-free reading. Customize every reading setting to create the perfect reading experience for you. Our mission is to Help Readers Find The Novels They Love, so every reader can become fully immersed in the world of stories. Start reading your favorite book, by downloading the Funovel app！ Privacy Policy https://www.funovel.net/privacypolicy/shownews.php?id=3 Terms of Use https://www.funovel.net/termsofservice/shownews.php?id=4 Standard Apple Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
Focus on niche genres and user-curated collections.
Assumption to check: Limited book selection compared to larger platforms
Validate with people who use this workflow before building.
Hypothesis 2
Implement a more intuitive navigation structure.
Assumption to check: Inconsistent user experience with navigation
Validate with people who use this workflow before building.
Hypothesis 3
Add offline support for downloaded books.
Assumption to check: Lack of offline reading capabilities
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the subscription process with clear prompts.
Assumption to check: In-app purchase process can be confusing
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
React Navigation
Zustand
Axios
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.
