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
Novelpack
Welcome to NovelPack—the ultimate reading app for book lovers worldwide!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.4
3,530 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.
Build your own version
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 included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 Novelpack: 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
Welcome to NovelPack—the ultimate reading app for book lovers worldwide! Book Genres NovelPack offers a vast library of captivating stories across genres like romance, fantasy, mystery, sci-fi, and more. From steamy romances to thrilling adventures, our collection has something for everyone. Discover thousands of books, including exclusive titles from renowned authors. Daily Updates Stay hooked with daily updates on our bestsellers. Join in-app activities to unlock new chapters and enjoy bonus updates on weekends. Never miss a beat with NovelPack! Personalized Experience Customize your reading experience with adjustable font sizes, background colors, and screen brightness. Make NovelPack your perfect reading companion.These personalization options ensure that NovelPack adapts to your individual reading habits and preferences, making your experience as comfortable and enjoyable as possible. Whether you’re reading in bright sunlight or under a dim nightlight, NovelPack is designed to be your perfect reading companion. Privacy & Safety Your information is safe with us. We prioritize your privacy and ensure your data is protected. Rest easy knowing NovelPack is a secure reading space. Ready to dive into endless stories? Download NovelPack now and start your reading adventure! Subscription Agreement 1. Term: Weekly/Yearly subscription (auto-renewable subscription) 2. Price: $14.99/week, $129.99/year 3. Payment: The purchase fee will be deducted from your iTunes account. 4. Renewal: Apple iTunes account will automatically deduct the fee within 24 hours before the subscription expires, and the subscription will be extended for one cycle after the deduction is successful. 5. Cancellation: You can cancel the subscription at any time 24 hours before the subscription expires. 6. Manage Subscription: You can view and manage your renewal. 7. Privacy: https://www.ireader.mobi/novelpack/privacy.html 8. Terms of Service: https://www.ireader.mobi/novelpack/terms.html
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 advanced search filters and sorting options.
Assumption to check: Limited search functionality compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Ensure regular updates and notifications for new releases.
Assumption to check: Inconsistent updates to novel collections.
Validate with people who use this workflow before building.
Hypothesis 3
Add features for reviews, ratings, and user discussions.
Assumption to check: Lack of community features.
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate offline storage for novels.
Assumption to check: No offline reading capabilities.
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
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.
