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
Currency Converter Calculator•
Introducing Currency Converter Calculator, your go-to tool for quick and accurate currency exchange rates! Our app offers an array of features that cater to both frequent travelers and finance enthusiasts, ensuring yo...
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
8,449 ratings · Top 15%
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 Currency Converter Calculator•: map the core Travel workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Introducing Currency Converter Calculator, your go-to tool for quick and accurate currency exchange rates! Our app offers an array of features that cater to both frequent travelers and finance enthusiasts, ensuring you have all the information you need right at your fingertips. Currency Converter Calculator equips you with live exchange rates, even in offline mode, making it perfect for travelers. No more frantic internet searches or puzzling over unfamiliar currencies - we got you covered! Our app's real-time exchange rates enable you to make informed financial decisions. Whether you're negotiating deals with international partners or managing expenses for a global team, our app ensures precision in your financial transactions. Even in your day-to-day life, our app proves invaluable. It's your go-to currency converter for calculating expenses when shopping online from international retailers or planning vacations. Stay updated on currency fluctuations, and never overpay for foreign purchases again! Key Features: Offline Mode: Our app functions seamlessly offline, ensuring you can access exchange rates wherever you are, even without an internet connection. This feature is great for traveling to remote areas or on flights without Wi-Fi. Live Exchange Rates: Stay up-to-date with real-time exchange rates, giving you the most accurate conversion results possible. No more relying on outdated or inaccurate information. Multi-Currency Support: We offer support for a vast array of currencies from around the world, making this app versatile for both personal and professional use. Convert any currency you can imagine. Intuitive User Interface: Our app boasts a user-friendly design that requires no registration or complicated setup. Simply launch the app, enter the amount you wish to convert, select your currency, and choose the currency you want to convert to. It's that simple! Whether you're a traveler, a businessperson, or someone who simply values accuracy and efficiency, our currency converter app is here to simplify your life. Download the Currency Converter Calculator today, and enjoy accurate currency conversion at your fingertips! Subscribe to use the following features: • Live exchange rates • Multi-currency conversion • Faster conversion experience • Exchange rates for 170+ countries • Currency calculator Pricing: 1 Month subscription price: $10/month Pricing: 1 Year subscription price: $30/year Privacy policy: https://inventoone.com/info/f/privacy-policy-currency-converter Terms-of-services: https://inventoone.com/info/f/terms-of-services---currency-converter EULA- https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Written user reviews are not shown here. Check current App Store reviews >
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 automatic updates.
Assumption to check: Limited currency options in some apps
Validate with people who use this workflow before building.
Hypothesis 2
Use reliable APIs for real-time data.
Assumption to check: Inaccurate exchange rates
Validate with people who use this workflow before building.
Hypothesis 3
Simplify UI with fewer elements on the main screen.
Assumption to check: User interface can be cluttered
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to save favorite currencies and settings.
Assumption to check: Lack of user personalization features
Validate with people who use this workflow before building.
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 Native Picker Select
React Native Async Storage
Expo
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.
