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
Offline Pages
◆ Users choice - top #3 app in US App Store on launch day!
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.5
19 ratings · Top 50%
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 included18 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 Offline Pages: map the core Travel 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 robust caching and offline reading features.
Assumption to check: Limited offline functionality for complex web pages
Validate with people who use this workflow before building.
Hypothesis 2
Provide clear explanations and guides for premium features.
Assumption to check: In-app purchases may confuse users
Validate with people who use this workflow before building.
Hypothesis 3
Simplify UI/UX for a cleaner look.
Assumption to check: User interface can be cluttered
Validate with people who use this workflow before building.
Hypothesis 4
Optimize search algorithms for faster results.
Assumption to check: Search functionality can be slow
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
◆ Users choice - top #3 app in US App Store on launch day! ◆ The most accurate offline browser available on any platform. ◆ Saved pages from over 3 million websites. Tired of seeking Wi-Fi hotspots? Paying too much for cellular data? Commuting by subway with no 3G signal? This app allows you to save web pages with all the formatting, images, and entire linked pages, and view them offline without Internet connection. To save a page for offline reading, simply touch the button while surfing the web in a built-in browser. Better yet, send links from any iPad, PC, or Mac directly to your device by email or using a handy browser bookmark. Offline Pages is a Universal App. Buy it once, run it on all of your iOS devices. Designed for Productivity - Pixel-perfect preservation of website design - Support for HTML5 content - Support for websites that require login and password - Fullscreen mode for reading or presenting to clients - Intelligent detection of important links and multi-page articles - Add pages by e-mail or using a browser button What Our Users Say - "You get a virtual web surfing experience with no Internet access required" - Appolicious.com - "One of the most notable and dependable apps in this area" - blog.uis.edu - "A brilliant and useful idea that serves a need I never really considered until I got this app" - Vancouverite - "I can't tell you the number of times I've been sitting on a plane at 20,000 feet and someone says to me, "Hey.. how do you have Wi-Fi?" - AppSage - "A must if you have an iPad without 3G" - Champsak - "Exactly what I needed to help me close deals" - Drsurprise - "Essential bit of kit" Pro Upgrade Optional upgrade to Offline Pages Pro unlocks additional features: - Save complete websites by following links automatically - Download up to 50,000 pages per website - Complete control over which pages to download - Auto-update pages in background (great for blogs!) * - Organize pages with tags and mark them as read/unread. Getting Support We stand by our 12 hour support reply guarantee. If anything goes wrong, please contact support using links in Settings > About, or send email to [email protected]. * Subject to iOS multitasking limitations
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
React Navigation
Axios
React Native WebView
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.
