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
Christian Book Library
Christian Library is your all-in-one hub for faith-based reading, study, and reflection
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 Christian Book Library: 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
Implement personalized recommendations and genre filtering.
Assumption to check: Limited book discovery features
Validate with people who use this workflow before building.
Hypothesis 2
Add options to share books on social media.
Assumption to check: Lack of social sharing functionality
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to download books for offline access.
Assumption to check: No offline reading capabilities
Validate with people who use this workflow before building.
Hypothesis 4
Enhance settings with user preferences and app themes.
Assumption to check: Basic settings management
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
Christian Library is your all-in-one hub for faith-based reading, study, and reflection. Dive into Scripture, discover theological works, and grow spiritually through curated devotionals, sermons, and community discussions — all within a beautifully designed, ad-free experience. Whether you’re a lifelong believer, seminary student, or simply exploring Christianity, the Christian Library app brings centuries of wisdom to your fingertips with powerful study tools and personalized daily reflections. FEATURES Bible & Reading Hub • Read multiple Bible translations (KJV, NIV, ESV, NRSV, etc.) • Explore Christian classics, theology, devotionals, and biographies • Highlight, annotate, and save notes across all your devices Study & Research • AI-powered “Theo Assistant” helps explain verses and doctrines • Compare translations side-by-side • Read commentaries from respected theologians Daily Faith & Practice • Receive a Daily Verse and Reflection to start your morning • Track prayers and gratitude in your private journal • Access the liturgical calendar for daily readings and feasts Community & Connection • Join Bible study groups and faith discussions • Share verses or reflections with friends • Engage in a positive and respectful Christian community Audio & Media • Listen to audio Bibles, sermons, and faith podcasts • Watch educational Christian video courses • Browse a gallery of sacred art and Christian music WHY CHRISTIAN LIBRARY? • Curated content from trusted Christian authors and leaders • Clean, reverent, and ad-free environment • Designed to deepen understanding and build daily habits of faith PRIVACY & SECURITY We value your trust. Christian Library stores your journals and highlights securely and never sells data. All private content is end-to-end encrypted and synced only with your account.
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
zustand
react-native-gesture-handler
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.
