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
AnyConversion
AnyConversion is a powerful, user-friendly app for iOS and macOS, designed to simplify currency exchange and unit conversions on the go
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 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 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 AnyConversion: 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
Expand the list of supported units and categories.
Assumption to check: Limited unit types available for conversion
Validate with people who use this workflow before building.
Hypothesis 2
Add a feature to bookmark frequently-used conversions.
Assumption to check: No option to save favorite conversions
Validate with people who use this workflow before building.
Hypothesis 3
Include graphs or statistics on conversion usage over time.
Assumption to check: Lack of historical data analysis
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a dark mode for better usability at night.
Assumption to check: No dark mode option
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
AnyConversion is a powerful, user-friendly app for iOS and macOS, designed to simplify currency exchange and unit conversions on the go. Instantly convert between 160+ global currencies with real-time exchange rates, ensuring accuracy for travelers, shoppers, and professionals. Beyond currency, AnyConversion handles a wide range of unit conversions, including length, weight, temperature, volume, and more, all within a sleek, intuitive interface. Customize your experience with offline mode for currency conversions, a built-in calculator for quick math, and widgets for instant access on your iPhone, iPad, or Mac. Seamlessly sync your favorite conversions across devices via iCloud and enjoy a distraction-free experience with no ads. Whether you're planning a trip, cooking, or working on a project, AnyConversion is your go-to tool for fast, reliable conversions.Key Features: Real-Time Currency Conversion: Supports 160+ currencies with live exchange rates. Comprehensive Unit Converter: Convert length, weight, temperature, volume, and more. Offline Mode: Access recent currency rates without an internet connection. iCloud Sync: Save and sync favorite conversions across iOS and macOS. Widgets & Shortcuts: Quick access from your Home Screen or Mac menu bar. Built-In Calculator: Perform calculations without leaving the app. Ad-Free Experience: Focus on conversions with a clean, distraction-free design. Download AnyConversion now and make conversions effortless, anytime, anywhere!
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.
