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
xoFocus AI Highlighter
xoFocus is an AI-powered highlighter that helps you focus on what matters.
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
7 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 included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 xoFocus AI Highlighter: map the core Productivity 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 user feedback to refine AI algorithms.
Assumption to check: Limited AI accuracy in highlighting important text.
Validate with people who use this workflow before building.
Hypothesis 2
Add multiple sharing options across platforms.
Assumption to check: Inadequate sharing options for highlighted text.
Validate with people who use this workflow before building.
Hypothesis 3
Offer a free tier with basic features to attract users.
Assumption to check: Subscription model may deter users from trying premium features.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify onboarding and provide guided tutorials.
Assumption to check: Complexity of features might overwhelm new users.
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
xoFocus is an AI-powered highlighter that helps you focus on what matters. xoFocus instantly identifies key sentences on pages you're reading - so you can quickly grasp core ideas, stay focused, and read more intentionally. Designed for readers, students, journalists, researchers, and anyone who wants more focus at their fingertips. Features: •Smart Highlights: xoFocus uses AI to highlight the most context-relevant sentences on any text-heavy page. •Smart Navigation: Quickly skip forward/backward through highlights with simple screen taps. How It Works: Enable xoFocus in Safari. When you open a webpage, highlight animations load instantly. Double-tap the top or bottom of your screen to move between highlights. xoFocus helps you cut through the noise: no AI-generated summaries, no logins, no tracking. Just an enhanced reading experience.
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
Async Storage
Axios
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.
