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
Novellair
Novellair is an online reading platform that is home to a wide range of stories.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.2
2,800 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'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 Novellair: 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
Novellair is an online reading platform that is home to a wide range of stories. Hide away with endless stories in Novellair, a book nook just for you! Take your pick from an extensive range of genres. Whether it's a captivating romance or a heartstopping thriller you're craving, Novellair can satisfy you. Tickle your reading fancies with something new or stick to your favourite themes - whichever you choose, we have what you need. With thousands of irresistible titles from popular authors and up-and-coming writers, you'll be spoilt for choice.Behind our captivating library is Letterlux, a creative hub where fresh voices and seasoned authors craft stories for Novellair. If you're passionate about storytelling, you can even apply to join Letterlux through the link: https://letterlux.tech/ and see your book featured on Novellair. Fill your library with all the stories you love and escape into the world of books with Novellair. 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 vouchers received each month are limited. If you need more coins, please make an additional recharge. 8. Privacy:https://fqnewapi.novellairs.com/privacy_policy 9. Term of Service:https://fqnewapi.novellairs.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
Implement personalized recommendations based on user reading history.
Assumption to check: Limited book discovery features
Validate with people who use this workflow before building.
Hypothesis 2
Add advanced sorting and filtering options.
Assumption to check: Difficulty in managing large libraries
Validate with people who use this workflow before building.
Hypothesis 3
Provide clearer explanations of premium features and trial periods.
Assumption to check: In-app purchase confusion
Validate with people who use this workflow before building.
Hypothesis 4
Optimize content delivery and caching mechanisms.
Assumption to check: Slow content loading times
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
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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.
