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
CustomSearch 2
Version 2! Completely Revamped
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.5
2 ratings · Below Average
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 included16 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 CustomSearch 2: map the core Productivity 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
Introduce advanced query building features.
Assumption to check: Limited functionality for complex queries
Validate with people who use this workflow before building.
Hypothesis 2
Implement cloud storage for syncing across devices.
Assumption to check: No cloud sync for saved queries
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to set custom notifications for saved searches.
Assumption to check: Lack of customizable notifications
Validate with people who use this workflow before building.
Hypothesis 4
Add analytics to track search success and user engagement.
Assumption to check: No analytics for search performance
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
Version 2! Completely Revamped Custom Search Engine 2 has been rebuilt from the ground up with SwiftUI. Faster, cleaner, and now including a full native iOS app for iPhone and iPad. Take back control of where Safari sends your searches. Choose from 29 built-in engines or add your own. Enable, disable, and switch engines in seconds from the Safari toolbar. 29 Built-in Search Engines Brave Search, Kagi, DuckDuckGo, Startpage, SearXNG, Perplexity, Google, Bing, and 21 more, all pre-configured and ready to use. No setup needed. Bang Shortcuts Override your default engine for any single query. Type k! for Kagi, d! for DuckDuckGo, pp! for Perplexity, y! for YouTube... no settings change required. Works at the start or end of any search. Add Your Own Engines Any search engine works. Enter a URL with %s as the query placeholder, assign a bang shortcut, and go. Your Privacy, Protected The extension operates at the URL level only. It never reads page content, never stores your queries, and never makes network requests. What you search is yours alone. How It Works 1. Enable the extension in Safari Settings → Extensions 2. Tap the toolbar icon to pick your default engine 3. Search as you always do, Safari redirects automatically Available for Mac (Safari App Extension) and iPhone & iPad (Safari Web Extension). Free, no account, no subscription, no ads, no tracking.
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 Navigation
Axios
React Query
Async Storage
Expo
TypeScript
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.
