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
Panel Box
Panel Box: Your Ultimate Comic Reading Companion
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
23 ratings · Top 15%
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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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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 Panel Box: 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
Enhance discovery with personalized recommendations and trending sections.
Assumption to check: Limited book discovery features compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a community section for reviews and discussions.
Assumption to check: Lack of community features for sharing thoughts on books.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce a more subtle approach to premium features.
Assumption to check: In-app purchase prompts can be intrusive.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify navigation and prioritize essential features.
Assumption to check: User interface can feel cluttered with too many 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
Panel Box: Your Ultimate Comic Reading Companion Welcome to Panel Box, a premium comic reading app built for true comic lovers. From immersive visual storytelling to powerful reading tools, Panel Box delivers a smooth, focused, and highly interactive comic experience — panel by panel. Whether you’re diving into ongoing series or revisiting your favorite moments, Panel Box is designed to make every read effortless and memorable. Key Features Home & Featured · Handpicked Masterpieces Start your journey on our Home screen, featuring curated "Weekly Picks" and trending titles. Skip the endless scrolling—our team handpicks the best masterpieces to ensure you're always in sync with the hottest comic trends. Smart Search · Discover What's Hot Find any comic, author, or keyword instantly. Our optimized search engine includes a "Trending Searches" section, helping you stay ahead of the curve by discovering what the community is reading right now. Library · Organized & Personal Keep all your favorite comics in one place. Track reading progress automatically and continue exactly where you left off. Reading Moments · Capture the Highlight See something unforgettable? Capture it instantly. Panel Box lets you take reading snapshots directly in the reader. All snapshots appear in your bookshelf — simply tap one to jump straight back to the exact page and moment it was captured. Timeline Slider with Thumbnails Navigate long chapters effortlessly using the progress slider with page thumbnails. Preview pages as you slide and jump precisely to any scene without guessing. User Center · Transparent & Secure Manage your reading profile with ease. Access your Order History to track your purchases and subscriptions. We ensure a safe experience with easy access to our User Agreements and Privacy Policy. Smooth & Immersive Reading Enjoy optimized image rendering, fast loading, and fluid page transitions for a truly distraction-free reading experience. Why Panel Box? Pure Focus: Built exclusively for comics, nothing extra, no distractions. Trending Insights: Stay updated with the latest hits via our trending search categories. Visual Memory: The only reader that lets you teleport back to your favorite scenes via snapshots. Speed & Clarity: Optimized for high-definition visual comfort and rapid loading. Professional Support: Dedicated user center for clear order tracking and privacy protection. Download Panel Box now and experience comics the way they were meant to be read — focused, fluid, and unforgettable. Panel Box_Privacy Policy：https://panel-box.com/privacy_Policy.html Panel Box_terms and use：https://panel-box.com/terms_and_Conditions.html
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
React Navigation
AsyncStorage
axios
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.
