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
NovelBar
NovelBar is an innovative reading platform that offers a vast library of trending novels across diverse genres
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.1
2,182 ratings · Top 30%
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 included15 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 NovelBar: 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
NovelBar is an innovative reading platform that offers a vast library of trending novels across diverse genres. From passionate romances to thrilling adventures, NovelBar provides an extensive selection of books designed to leave you spellbound. We believe reading is more than just a pastime—it’s a way to escape, relax, and explore new worlds. That’s why our collection is carefully curated to cater to every preference. Whether you're drawn to heartfelt love stories or edge-of-your-seat fantasy, NovelBar has the perfect book waiting for you. Behind our expansive library is Letterlux, a dynamic platform where talented authors bring fresh, high-quality content to readers like you. If you're an aspiring author, you can apply to become a Letterlux signed writer through the link: https://letterlux.tech/ and have your novel featured on NovelBar. So whether you're a seasoned reader or simply looking to broaden your literary horizons, NovelBar is your go-to app for immersive, unforgettable stories. Subscription Agreement 1. Period：monthly(auto-renewable subscriptions) 2. Price：$19.99/month 3. Payment: The purchase will be charged to your iTunes account. 4. Renewal: The Apple iTunes account will automatically deduct fees within 24 hours before the subscription expires. After successful deduction, the subscription will be postponed for one cycle. 5. Cancel：You can cancel your subscription at any time 24 hours before the subscription expires. 6. Manage subscriptions: You can view and manage your renewals. 7. Award：After subscribing, the coins and bonus received each month are limited. If you need more coins, please make an additional recharge. 8. Privacy:https://api.novelbars.com/privacy_policy 9. Term of Service:https://api.novelbars.com/user_agreement
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
Curate a more diverse selection with user recommendations.
Assumption to check: Limited novel selection compared to larger platforms
Validate with people who use this workflow before building.
Hypothesis 2
Integrate social sharing options for users to share their favorite novels.
Assumption to check: Lack of social features for sharing recommendations
Validate with people who use this workflow before building.
Hypothesis 3
Implement a cloud sync feature for reading progress.
Assumption to check: Inconsistent reading experience between different devices
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to categorize novels and create custom shelves.
Assumption to check: Limited customization options for users' libraries
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
Zustand
React Navigation
shadcn/ui
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.
