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
Novelix
Congratulations! You've discovered a reading haven: Novelix
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 2.9
548 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'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 Novelix: 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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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
Enhance catalog with diverse genres and exclusive titles
Assumption to check: Limited content variety compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement a cleaner, more organized layout
Assumption to check: User interface can be confusing
Validate with people who use this workflow before building.
Hypothesis 3
Provide clearer information on subscription benefits and pricing
Assumption to check: In-app purchases can be unclear
Validate with people who use this workflow before building.
Hypothesis 4
Optimize app performance and loading times for better user experience
Assumption to check: Performance issues during heavy usage
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Congratulations! You've discovered a reading haven: Novelix If you're still looking for great novels, check out Novelix! In there, we have prepared all kinds of books in various genres and colorful tags, including but not limited: fantasy, werewolf, vampire, dragon, witch, romance, CEO, professor, mafia, king, playboy, LGBTQ+, contract marriage, revenge, rebirth, time- travel, magical world... Download the app to find more! Whether you're a fan of paranormal and werewolf novels or a lover of sweet romance, you'll find the one that matches your interests here! Besides, we have more surprises in store for you: - Eye-protection & personalized reading page. Try to provide you with a more smooth and comfortable reading experience! - Free books. Make it easy for you to read more wonderful novels! - Multiple tasks to get free coupons! Make your reading journey easier and cheaper! - Quality team of local authors. Try to provide you with the most authentic novel! - Stable and fast update. Minimize the time you have to wait for a great story! - Enjoy communicative-style reading with your friends. It's more fun to read with people you like! - Support off-line reading. Let you enjoy the novel anytime, anywhere! Anyone who comes to Novelix will be delighted and relaxed, and I'm sure you won't regret that choice! Don't hesitate! Wonderful novels has been waiting for you for a long time, so join us on our reading journey! 【Membership Description of Auto Subscription Service】 1. Subscription Period：1 week/1 year 2. Subscription Price：$14.99 (Weekly) / $99.99 (Yearly) 3. Buying subscription Membership will automatically debit your iTunes account and extend the service period 24 hours before service expires. 4. If you want to unsubscribe, please open the iOS "Settings" —> enter "iTunes Store and App Store" —> click "Apple ID", select "View Apple ID", go to the "Account Settings" page, click "Subscribe" ", choose Novelix to unsubscribe. If you do not unsubscribe at least 24 hours before the end of the subscription period, this subscription will be automatically renewed. 5. Service Agreement：https://api.words-fly.com/site/Novelix/termofuse 6. Privacy Agreement：https://api.words-fly.com/site/Novelix/privacy
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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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 Query
Zustand
React Navigation
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.
