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
Speed Reader - RSVP Reading
Speed Reader transforms the way you read using RSVP, Rapid Serial Visual Presentation, one of the most effective reading techniques ever developed
$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 included17 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 Speed Reader - RSVP Reading: 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
Provide a tutorial or onboarding process to explain features.
Assumption to check: Users often find speed reading apps overwhelming due to lack of guidance.
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate comprehension checks or summaries after reading.
Assumption to check: Difficulty retaining information while reading quickly.
Validate with people who use this workflow before building.
Hypothesis 3
Partner with publishers to provide a wider selection of books.
Assumption to check: Limited content availability in current apps.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize text size, background color, and speed settings.
Assumption to check: Few customization options for reading experience.
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
Speed Reader transforms the way you read using RSVP, Rapid Serial Visual Presentation, one of the most effective reading techniques ever developed. Instead of scanning lines of text, words appear one at a time in a fixed focal point, eliminating subvocalization and unnecessary eye movement so your brain can absorb information faster than you ever thought possible. Whether you're a student drowning in reading assignments, a professional trying to stay on top of industry news, or a book lover who wants to read more titles in less time — Speed Reader is built for you. WHAT IS RSVP? Most people read at 200-250 words per minute. RSVP readers routinely reach 400, 600, even 800+ WPM with practice. The technique is simple: one word at a time, displayed at the center of your screen. Your eyes stay still. Your brain does the rest. KEY FEATURES - Import PDFs, ePubs, HTTPS web pages, HTML files, plain text - .txt files, md (markdown files) - Adjustable reading speed — start slow and build up at your own pace - Reading streaks / stats - Chapter navigation - Detailed reading stats and progress tracking - Clean, distraction-free reading interface - collapsable navigation - Customizable display settings HOW IT WORKS Import any document or paste any text, set your words-per-minute speed, and press play. Speed Reader does the rest. Start your free 7-day trial with full access to every feature, then unlock the full app for a single one-time payment — no subscription, no recurring fees, ever. PERFECT FOR - Students tackling textbooks and research papers - Professionals keeping up with reports, articles, and emails - Book lovers who want to read their entire reading list - Anyone curious about speed reading who doesn't know where to start Download Speed Reader today and discover what reading at full speed feels like.
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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
Zustand
react-navigation
react-native-slider
expo-linear-gradient
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.
