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
Convert Currency for Safari
Transform Your Currency Experience
$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 Convert Currency for Safari: map the core Finance 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
Include a wider range of currencies and real-time exchange rates.
Assumption to check: Limited currency options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Add conversion history feature to track past conversions.
Assumption to check: No historical conversion records
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to save preferred currencies for quicker access.
Assumption to check: Lack of user preferences
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a subscription model for premium features such as advanced analytics.
Assumption to check: Static pricing model
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
Transform Your Currency Experience Convert Currency is the fastest way to check exchange rates while browsing the web. Whether you are planning international travel, shopping on foreign websites, tracking cryptocurrency prices, or managing global investments, this Safari extension makes currency conversion effortless and instant. Powerful Conversion Engine Access over 200 currencies including all major fiat currencies and popular cryptocurrencies like Bitcoin and Ethereum. Convert any amount with a single tap. Swap currencies instantly with the dedicated swap button. Floating Widget on Any Website Keep your favorite currency pairs visible while you browse. The draggable widget stays on top of any webpage. Position it anywhere on your screen and your preference is saved. Add unlimited favorite currency pairs for instant tracking. Smart Features That Save Time The extension remembers your last conversion, so you can pick up exactly where you left off. Popular currencies appear first in dropdown menus for faster selection. One-click favorite management lets you build your personal watchlist. The compact interface fits perfectly in your Safari toolbar without taking up screen space. Built for Privacy and Performance No account or sign-up required. No data collection or tracking. Works completely offline after initial rate fetch. Minimal battery impact with smart caching. Native Safari integration for maximum performance. Supports both iOS and macOS seamlessly. Perfect For International travelers checking prices abroad. Online shoppers comparing deals across countries. Cryptocurrency enthusiasts monitoring digital asset prices. Freelancers receiving payments in multiple currencies. Investors tracking foreign market values. Students studying international economics. Expatriates managing finances across borders. Business professionals handling global transactions. Start converting smarter today. Download Convert Currency and experience the most elegant way to track exchange rates in Safari.
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
axios
react-navigation
zustand
react-native-paper
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.
