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
MultiAgent – Web Extension
Custom User-Agent for Safari
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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/
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 MultiAgent – Web Extension: 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
Ensure a feedback system is in place to gather and display user reviews.
Assumption to check: Lack of user reviews and ratings can deter new users.
Validate with people who use this workflow before building.
Hypothesis 2
Add more advanced tools and functionalities to cater to power users.
Assumption to check: Limited features may not satisfy advanced users.
Validate with people who use this workflow before building.
Hypothesis 3
Implement a guided onboarding flow to help users understand app functionalities.
Assumption to check: No clear onboarding process might confuse new users.
Validate with people who use this workflow before building.
Hypothesis 4
Provide clear explanations and prompts for in-app purchases.
Assumption to check: In-app purchase options may be unclear.
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
Custom User-Agent for Safari Control how websites see your browser. Set different User-Agent strings for each website with built-in presets or custom values. KEY FEATURES • Per-Website User-Agent Rules Set different User-Agent for each domain with flexible matching: exact domain, URL prefix, or regex patterns. • Built-in Browser Presets Quick access to popular User-Agent strings: Chrome, Firefox, Edge, Safari, mobile browsers, and more. • iCloud Sync Your rules sync automatically across iPhone, iPad, and Mac. • Privacy-Focused All processing happens locally on your device. No data collection, no tracking. HOW IT WORKS 1. Enable MultiAgent in Settings → Safari → Extensions 2. Visit any website 3. Tap the Extensions icon in Safari's address bar 4. Select a User-Agent preset or create a custom rule 5. Page reloads with your chosen User-Agent PERFECT FOR • Web developers testing cross-browser compatibility • Designers previewing mobile layouts on desktop • Privacy-conscious users controlling browser fingerprinting • Anyone needing precise control over User-Agent headers MultiAgent seamlessly integrates with Safari on all your Apple devices, providing power and flexibility with a native, privacy-focused experience.
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
react-navigation
react-native-paper
expo-secure-store
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.
