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
OL Reader
OL Reader transforms your EPUB library into a personal listening experience powered by on-device AI
$4.99 · In-app purchases
PRICE
$4.99
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 included16 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 OL 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
Implement personalized recommendations and social sharing features.
Assumption to check: Limited book discovery features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Add offline access to downloaded books.
Assumption to check: Lack of offline reading capabilities
Validate with people who use this workflow before building.
Hypothesis 3
Enhance reading stats and visual progress indicators.
Assumption to check: Inadequate progress tracking
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a social aspect for users to connect and share book reviews.
Assumption to check: No community engagement 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
OL Reader transforms your EPUB library into a personal listening experience powered by on-device AI. Import your favorite books and let the built-in Kokoro neural text-to-speech engine read them aloud with stunningly natural voices — no internet connection required, no subscriptions, and complete privacy. Whether you're commuting, cooking, or resting your eyes, OL Reader makes your entire ebook collection accessible as spoken audio. The AI runs entirely on your device using Apple's MLX framework, delivering high-quality narration without sending a single word to the cloud. Key Features: • On-Device AI Narration — Kokoro neural TTS produces natural, expressive speech that sounds remarkably human. No network needed. • Multiple Voice Options — Choose from a variety of voices to find the perfect narrator for every book. • Smart Library Management — Import and organize your EPUB collection with ease. Browse covers, search titles, and pick up right where you left off. • Memory-Efficient Reading Engine — An advanced chunking system with intelligent prefetching keeps scrolling buttery smooth, even for thousand-page novels. • Seamless Read & Listen — Follow along visually with real-time text highlighting as the AI reads, or simply close your eyes and listen. • Privacy First — All processing happens on your iPhone or iPad. Your books and reading habits never leave your device. • Robust Text Handling — Gracefully handles complex Unicode, special characters, and even poorly formatted EPUBs without skipping a beat. OL Reader is perfect for avid readers who want hands-free access to their personal library, anyone with visual accessibility needs, language learners who benefit from hearing text read aloud, or multitaskers who want to enjoy books while on the go. Turn every moment into reading time — your books have never sounded this good.
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
Zustand
@supabase/supabase-js
react-native-reanimated
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.
