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
Knigorad: Books & Novel Reader
Knigorad — your pocket library, where thousands of novels and web fiction are waiting for you free
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 3.9
81 ratings · Top 50%
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 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 Knigorad: Books & Novel Reader: 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
Add personalized recommendations based on user reading history.
Assumption to check: Limited book discovery options
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the paywall and subscription process.
Assumption to check: In-app purchase complexity
Validate with people who use this workflow before building.
Hypothesis 3
Implement user feedback mechanisms to address pain points.
Assumption to check: 3.5 star rating indicates user dissatisfaction
Validate with people who use this workflow before building.
Hypothesis 4
Introduce sharing options and community features for readers.
Assumption to check: Lack of social features
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
Knigorad — your pocket library, where thousands of novels and web fiction are waiting for you free. No limits, no forced subscriptions — just open and read. We've gathered everything you love: romance, isekai fantasy, urban fiction, historical fiction, sci-fi, thrillers, action, mystery, post-apocalyptic, young adult, xuanhuan, wuxia. And the stories you can't put down: billionaire CEO romance, mafia romance, enemies to lovers, arranged marriage, secret baby, werewolf alpha & luna, vampire, magic, clan lore, magic academies, reincarnation and transmigration. Every story grabs you on page one and doesn't let go until the last word. Fresh chapters and new books land every day — your shelf keeps growing while you read. • Vast Genre Library Explore a huge catalog of online novels and original web fiction. Core genres: romance, isekai fantasy, urban fiction, historical fiction, sci-fi, thrillers, action, mystery, post-apocalyptic, young adult, xuanhuan, wuxia. Fan-favorite tropes: billionaire CEO romance, mafia romance, enemies to lovers, arranged marriage, secret baby, werewolf alpha & luna, vampire, magic, clan lore, magic academies, reincarnation and transmigration. Every story hooks you from the first page and keeps you hooked until the final chapter. • Customizable Reading Experience Tweak every detail to your liking: font, text size, background color, brightness, day & night mode, smooth scrolling, realistic page-flip animation and bookmarks. Save your favorite novels to a personal bookshelf and pick up right where you left off, anytime. • Read Online or Offline Stream novels online or download them to your device for offline reading. Enjoy your favorite stories at home, on your commute or while traveling — no internet required for downloaded titles. • Sync & Smart Recommendations Your reading progress auto-saves and syncs across all your devices. Just sign in to pick up right where you left off on any device. Our smart algorithm recommends new novels and web fiction tailored to your tastes. You can also browse top rankings and editor's picks. • Free to Read Most novels and chapters are free to read online and offline. New stories are added every day, so there's always something fresh to dive into. • Auto-Renewable Subscriptions Optional subscriptions are available in the app. You can read for free. Payment is charged to your iTunes account at confirmation of purchase. Subscriptions auto-renew unless canceled at least 24 hours before the end of the current period. Manage or cancel your subscription in your Apple ID settings. Privacy Policy https://web.cdreader.com/ru/appPrivacyPolicy.html?client_proid=194&mt=1 Subscription Terms https://www.weread.mobi/RU/CheckinCard/agreement.html?client_proid=194&mt=1 Terms of Service https://www.weread.mobi/RU/service_term.html?client_proid=194&mt=1
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 Navigation
axios
zustand
BUILD KIT DIFFICULTY
Advanced
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.
