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
ComicGlass
The definitive comic viewer, loved by users since its release in 2010
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.3
61 ratings · Top 30%
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 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 ComicGlass: 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 smoother transitions between comic pages.
Assumption to check: Inconsistent reading experience due to page transitions
Validate with people who use this workflow before building.
Hypothesis 2
Add options for users to share comics on social media.
Assumption to check: Limited social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Clarify subscription options and simplify purchase process.
Assumption to check: In-app purchases can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Implement a recommendation engine to suggest comics.
Assumption to check: Lack of recommendations based on user preferences
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
The definitive comic viewer, loved by users since its release in 2010. Effortlessly enjoy your scanned books and personal files at home or on the go. Experience the rich features and seamless performance built on over 15 years of continuous development. ■ Why Choose ComicGlass? User-Centric Design: Packed with "must-have" features and granular settings for the ultimate daily reading experience. Access Anywhere: View files from your PC/Mac, NAS, or cloud storage instantly, no matter where you are. Broad Format Support: From standard ZIP and PDF to the latest WebP, AVIF, and 7-Zip, we’ve got you covered. Buy Once, Enjoy Everywhere: A universal app for both iPhone and iPad. Get the best experience on all your devices with a single purchase. ■ Powerful Features 【Versatile File Management】 Easy Transfer: Use our dedicated Windows/Mac tool for effortless syncing, or simply use OS-standard file sharing and cloud storage. Sync Your Progress: "Bookmarks" stay synced across devices via iCloud. Start reading on your iPhone outside and pick up right where you left off on your iPad at home. Network Ready: Supports SMB (Windows File Sharing), FTP, WebDAV, and various cloud services. Cloud Support: Google Drive / Dropbox / OneDrive / OneDrive for Business / Box / iCloud. 【Advanced Reading Experience】 Fully Customizable: Fine-tune your experience with double-page spread views, right-to-left/left-to-right reading directions, margin cropping, and more. Streaming: Stream files directly from your PC, NAS, or Cloud storage without the need for downloading them to your device. ■ Supported Formats Archives: ZIP, CBZ, RAR, CBR, 7-Zip Documents: PDF Images: JPEG, PNG, BMP, WebP, AVIF, TIFF, GIF
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
Zustand
Axios
React Navigation
Firebase
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.
