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
Bookoscope - OPDS crawler
Bookoscope is a fast, searchable ebook catalog
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 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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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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Bookoscope - OPDS crawler: 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
Expand to support more OPDS catalogs and enhance discoverability.
Assumption to check: Limited OPDS source integration
Validate with people who use this workflow before building.
Hypothesis 2
Implement offline storage for previously accessed books.
Assumption to check: No offline access
Validate with people who use this workflow before building.
Hypothesis 3
Improve search algorithms and filters for better results.
Assumption to check: Poor search functionality
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize their library and themes.
Assumption to check: Limited customization options
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
Bookoscope is a fast, searchable ebook catalog. With Bookoscope, you can browse your own self-hosted ebook library as well as download public domain classics from Project Gutenberg. FEATURES: - Fast - Easy on the eyes - Includes over 70,000 public domain books from Project Gutenberg - Uses cached feeds (refresh on demand) - Searchable by any available metadata - Quick download and export to the ereader of your choice COMPATIBLE WITH: - Calibre-web - Kavita - Ubooquity - Any ebook server with OPDS 1.0 functionality WHY USE BOOKOSCOPE? Some ereader apps can connect to OPDS endpoints, but the functionality is tucked away and awkward. There's no way to browse and search all the ebooks you have access to, all at once. Bookoscope fills that niche. It crawls your OPDS endpoints, finds and caches all the books it can, and lets you easily download any of them to your device. From there, you can export them to your preferred ereader. BOOKOSCOPE IS NOT: - An ebook reader, sync client, or annotator, like Apple Books, Google Books, or Kindle. - A metadata editor or organizer, like Calibre. - A self-hosted ebook server, like Kavita, Ubooquity, or calibre-web. Bookoscope may be used with any of the above, but is not affiliated with any other app or tool. WHAT IS OPDS? OPDS is the open standard for web endpoints that expose catalogs of ebooks. Many people use home OPDS servers for their personal ebook libraries. WHAT IF I DON'T HAVE AN OPDS SERVER? That's okay! You can use Bookoscope to browse and download free, completely legal books in the public domain. Start with classics like: - Moby Dick - Frankenstein - Pride and Prejudice - The Great Gatsby - The complete works of William Shakespeare, Charles Dickens, Frederick Douglass, and more!
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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 Navigation
Expo
Axios
Zustand
React Native Paper
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.
