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
Bookology: Book Tracker
Bookology is a reading tracker and analytics app
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
702 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 Bookology: Book Tracker: 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
Allow users to create custom reading goals and categories
Assumption to check: Limited customization options for tracking progress
Validate with people who use this workflow before building.
Hypothesis 2
Implement cross-device syncing for a seamless experience
Assumption to check: Inconsistent user experience across devices
Validate with people who use this workflow before building.
Hypothesis 3
Introduce a social feed or sharing options to connect with friends
Assumption to check: Lack of social features to share progress with friends
Validate with people who use this workflow before building.
Hypothesis 4
Enable offline access to previously logged books and stats
Assumption to check: No offline functionality
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
Bookology is a reading tracker and analytics app. Whether you're a casual reader or a devoted bookworm, it helps you organize your library, track your progress, and build a lifelong reading habit with ease. [Library Management] - Quickly add books via barcode scanning, online search, or manual entry - Track reading status: Want to Read, Reading, Finished, Abandoned, On Hold - Organize your collection with custom booklists - Support for categories and series management [Visual Bookshelf] - Skeuomorphic bookshelf with spine and cover display modes - Customize decorations and ornaments to create your own reading space - Sync shelves and lists across devices via the cloud [Reading Timer] - Dedicated reading timer that automatically logs each session - Supports Live Activities for real-time lock screen updates - Start / pause / resume without breaking your tracking - Literary Clock: shows excerpts from literature based on the current time - Add countdown timers to stay focused and goal-oriented [Progress Tracking] - Log progress by pages or percentage - Reading calendar for a clear daily overview [Notes & Reflection] - Capture quotes, thoughts - Support for images and export - Write reviews and rate books - Daily note review: rediscover past notes with a curated daily selection [Multi-Platform Import] - Import notes from Kindle, Apple Books, WeRead, and DiMo Reader - Import your library from Goodreads - Automatic deduplication [Reading Stats & Insights] - Analyze reading time and session patterns - Track formats: print, eBook, audiobook - Monthly and yearly reading summaries - Annual book showcase - Most-read books statistics [Widgets] - Home screen widgets for quick progress tracking - Reading streak widget to help maintain your habit [Bookology Pro] - Cloud backup and cross-device sync - Unlimited booklists - Advanced stats and historical data - Unlimited reading session logs - Full access to bookshelf decorations - Goodreads library import - Continuous access to future Pro features Bookology is dedicated to being your best reading companion, exploring the joy of reading together with you. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://empty.mt/privacy_policy_bookology
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
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Redux
react-navigation
react-native-chart-kit
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.
