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
Bitcoin Convert
Bitcoin Convert is the fastest/easiest way to check BTC/Altcoin rates and historical price points against fiat currencies at a glance
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
510 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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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.
JavaScript is required to complete mailbox verification.
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 Bitcoin Convert: map the core Finance workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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
Add support for more cryptocurrencies and fiat options.
Assumption to check: Limited currency options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate price trend charts and analytics.
Assumption to check: No advanced charting features
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize the app interface and settings.
Assumption to check: Lack of user customization options
Validate with people who use this workflow before building.
Hypothesis 4
Implement alerts for significant price changes.
Assumption to check: Minimal notification features
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
Bitcoin Convert is the fastest/easiest way to check BTC/Altcoin rates and historical price points against fiat currencies at a glance. It's simple and intuitive. If you need to know when Bitcoin (or any alt coin) drops below, or raises above a certain price point - you can easily set price alerts to be notified. Because Bitcoin is a high value asset, you may want to check smaller values. No problem, you can easily calculate conversions in Satoshi. The optional header shows a running total for your entire portfolio of coins - super handy for quickly tracking the value of your entire crypto fortune. Each coin displayed shows the current price (in your chosen fiat currency) with a swing indicator. It's also possible to display the current value of your individual coin hodlings by clicking on each individual coin and accessing the detail page. Crypto Detail page ============= It's super easy to check how much fiat your coin is worth, and vice-versa on the coin detail page. Historical data is optionally available for any of the supported coins on it's corresponding detail page. Handy links to the official coin page are also included on this page, along with current rates and current price swing indicators. It's also possible to display individual coins rates against different fiat currencies. For instance you can display bitcoin against USD, and ethereum against the Euro. Many top alt coins supported ====================== We know that most people like to diversify their portfolio, so we've added support for also checking fiat rates against the following popular altcoins: Ethereum, Litecoin, Dogecoin, XRP, Dash, NEM, Monero, Ethereum Classic, NEO, Bitcoin Cash, Zcash, Bitcoin Gold, Stellar, Cardano, EOS, TRON, ICON, Qtum, Nano, Lisk, Electroneum, Ardor, Ark, VeChain, Tether, Ontology, Tezos, Binance Coin, Maker and Solana Bitcoin Convert is the best way for: -Keeping up to date with market fluctuations -Checking the value of your Bitcoin/Altcoin investments -Getting a Bitcoin/Altcoin value for a certain Fiat amount Bitcoin Convert supports calculations against most popular Fiat currencies.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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
Supabase
React Navigation
Axios
React Native Reanimated
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.
