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
Private Browsing White
Introducing the PRO Edition of our most popular private web browser! With improved minimalist design for iPhone and iPod
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
4,344 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 included17 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 Private Browsing White: 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
Offer customizable settings and features that mimic full desktop browsers.
Assumption to check: Limited features compared to full browsers (e.g., no extensions or advanced settings)
Validate with people who use this workflow before building.
Hypothesis 2
Implement user accounts for syncing bookmarks and history across devices.
Assumption to check: No account sync across devices
Validate with people who use this workflow before building.
Hypothesis 3
Provide a more flexible free tier with essential features.
Assumption to check: In-app purchase limitations after few uses
Validate with people who use this workflow before building.
Hypothesis 4
Create a guided onboarding experience to introduce app features.
Assumption to check: Confusing UI for first-time 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
Introducing the PRO Edition of our most popular private web browser! With improved minimalist design for iPhone and iPod. Improved speed on iPhone and iPad with Retina Display! Finally, you can view all your websites PRIVATELY and in FULL SCREEN on your iPhone, iPod, and iPad! This is the simple, no frills web browser you've been waiting for. • COMPLETE PRIVATE BROWSING • FULL SCREEN (13% MORE VIEWING AREA) • FASTER NO FRILLS How it works: - History, Cookies, Cache, All completely deleted when you exit the app. No one will know where you've been. - Uses EVERY SINGLE PIXEL available to show websites in BEAUTIFUL FULL SCREEN! That's 13% more viewing area than standard Safari! Thanks to hiding of Status bars and auto hiding of all navigation controls when required. - Same back end safari browsing engine which means maximum speed, security, and reliability. Familiar Interface. So get it now and start browsing those websites in beautiful full screen without anyone knowing where you've been! Some other features and Details: - Portrait and Landscape mode support. - Orientation Locking Support for iPad. - Similar UI to Safari. - Hidden status bar to make more space. - Overlay controls to maximise screen real-estate. - Safari based backend engine. - Lightning fast startup and shutdown. - Always starts in ask/google search home. - No auto suggest or auto-fill in. - Very discrete icon and presentation. - Tiny download so you can get it quickly. more apps: http://www.savysoda.com
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-native-webview
react-navigation
@react-native-async-storage/async-storage
BUILD KIT DIFFICULTY
Starter
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.
