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
Blue Letter Bible
Powerful Bible study tools linked to every verse in an easy-to-use, personalized Bible reader!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
356,023 ratings · Top 5%
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 included18 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 Blue Letter Bible: map the core Reference 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
Provide downloadable content for offline use
Assumption to check: Limited offline access to resources
Validate with people who use this workflow before building.
Hypothesis 2
Optimize search algorithms for faster results
Assumption to check: In-app search can be slow
Validate with people who use this workflow before building.
Hypothesis 3
Simplify navigation and prioritize key features
Assumption to check: Navigation can feel cluttered with too many options
Validate with people who use this workflow before building.
Hypothesis 4
Implement a better note management system with tagging and categorization
Assumption to check: Difficulty in organizing personal notes
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
Powerful Bible study tools linked to every verse in an easy-to-use, personalized Bible reader! Dig deep into God’s Word with over 30 Bible versions, audio Bibles, text and audio commentaries, Hebrew / Greek lexicon, concordances, dictionaries, advanced word searches, and more. Customize your reading experience with rich color themes, fonts, auto scrolling, and parallel version views. Personalize your study with highlighting, underlining, and note taking options – all with Cloud back up. Join our 7.5 million+ annual website users and 1 million+ app users who choose to dig deeper into God’s Word with Blue Letter Bible! POWERFUL FREE BIBLE STUDY TOOLS • Study the Hebrew & Greek with our original language lexicon • Perform advanced word study searches using the many available dictionaries and encyclopedias • Use the Treasury of Scripture Knowledge for an in-depth study • Read from the many available text commentaries • Listen to the Bible and audio commentaries CUSTOMIZED BIBLE READER • Christian Standard Bible (CSB) comes free & installed as part of the core Bibles! • English Standard Version (ESV) is a free download • Legacy Standard Bible (LSB) is a free download • NASB and NASB2020 are free to download • Choose from over 30 Bible translations available in English, Spanish, Chinese, Korean, German, Russian, French, Hebrew, and Greek • Choose from various color themes, adjustable fonts and sizes with an automatic option • Read different Bible versions side-by-side • Read the Bible with the variable speed auto-scroll feature PERSONALIZED BIBLE STUDY • Share verse passages to iMessage, Email, Twitter, Facebook, Google+ and more • Bookmark your favorite chapters with visual indicators in the app and organize them in custom folders • Highlight and underline your favorite verses in customizable colors • Backup, restore, and share your preferences locally from iCloud QUESTIONS? Questions or issues with the BLB app after updating? We’re here to serve! First, visit our FAQs by clicking on the link to our support site to see if your question can be answered there. If not, please leave your feedback on the support page and a member of our staff will get back to you as soon as possible. For those leaving iTunes Customer Reviews, please know that we have no way of contacting you unless you leave your feedback on the support page. Please review and rate the Blue Letter Bible app! Ratings and feedback will help us to improve the Blue Letter Bible app.
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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
Zustand
React Navigation
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.
