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
AdGuard Pro: Safari Ad Blocker
AdGuard is an ultra-efficient ad blocker for Safari
$9.99 · In-app purchases
PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.4
3,084 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 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 AdGuard Pro: Safari Ad Blocker: map the core Utilities 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 guided setup process for users.
Assumption to check: Users often report difficulty in configuring custom filters.
Validate with people who use this workflow before building.
Hypothesis 2
Optimize background processes and resource usage.
Assumption to check: Some users find the app's performance laggy.
Validate with people who use this workflow before building.
Hypothesis 3
Enhance filtering capabilities with user-defined rules.
Assumption to check: Limited support for certain websites not being blocked.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the purchasing process with clear tier explanations.
Assumption to check: In-app purchases can be confusing to navigate.
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
AdGuard is an ultra-efficient ad blocker for Safari. It will not only remove annoying ads but also secure your privacy with advanced tracking protection. AdGuard for iOS is an open source app, it’s totally transparent and safe to use. KEY FEATURES: - Safari ad blocking. Removes all kinds of ads in Safari. Say goodbye to annoying banners, pop-ups and video ads. Whitelist your favorite websites or use manual blocking tool to hide any element on the page. - Privacy protection. The web is full of trackers that literally watch your every click. AdGuard offers a selection of filters aimed directly at trackers and web analytics that will ensure your private data stays that way. - Speed acceleration. Safari browser runs up to 4x faster. AdGuard removes tons of rubbish and you can freely surf the web! - Reduced traffic consumption and increased battery life. Banners and ads sometimes add up to half the size of the page. By blocking them, you’re saving your battery life and Wi-Fi/mobile traffic. - More than 50 popular subscriptions (EasyList, EasyPrivacy, etc.) plus AdGuard's own powerful ad filters, including language-specific filters. Together they don't leave ads a chance. ADGUARD PRO FEATURES AdGuard Pro includes the following features: - Custom filters. Add your own filters by URL even if they are not on the default list. - DNS privacy. Blocking regular online trackers is not enough if you want to assure 100% protection of your online privacy. Choose any of the user-favorite DNS providers or configure a custom DNS server. - Security filters. Protect yourself from dangerous websites riddled with cryptojacking or fraud. * Privacy policy: https://adguard.com/privacy.html * Terms of Use: https://adguard.com/eula.html ABOUT ADGUARD AdGuard is a leading company in developing ad blocking software for multiple platforms. For more than ten years AdGuard has been helping millions of users enjoy safe, clean, and fast internet. Follow us at @AdGuard on Twitter, facebook.com/AdGuardEn/ on FB or send us a message at [email protected].
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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
AsyncStorage
React Navigation
Shadcn/UI
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.
