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
Blockfolio Pro: Crypto Tracker
Blockfolio – Comprehensive Crypto & Fiat Portfolio Management
$1.99 · In-app purchases
PRICE
$1.99
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 Blockfolio Pro: Crypto Tracker: 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
Implement a customizable dashboard with user-defined asset groups.
Assumption to check: Users find it difficult to track multiple assets simultaneously
Validate with people who use this workflow before building.
Hypothesis 2
Add real-time alerts and custom thresholds for price changes.
Assumption to check: Inadequate notifications for price changes
Validate with people who use this workflow before building.
Hypothesis 3
Integrate multiple news APIs for richer content.
Assumption to check: Limited market data and news sources
Validate with people who use this workflow before building.
Hypothesis 4
Design a cleaner, more modern UI with better spacing and organization.
Assumption to check: User interface can feel cluttered
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
Blockfolio – Comprehensive Crypto & Fiat Portfolio Management Blockfolio is a professional portfolio management app that helps you track and manage your cryptocurrency and fiat investments efficiently. With real-time market data, advanced analytics, transaction tracking, wallet monitoring, and portfolio tools, Blockfolio provides everything you need to stay on top of your investments in one intuitive platform. Key Features Wallet Tracking • Track any wallet address — from whale wallets to personal ones • Monitor balances and token holdings in real time • Analyze wallet activity for better insights • Stay ahead by following market movers and trends Portfolio Management • Track your crypto and fiat portfolio overview • Monitor asset allocation and performance • Real-time balance updates • Profit/loss tracking with detailed analytics Currency Converter • Convert between fiat currencies with live exchange rates • Support for major cryptocurrencies (Bitcoin, Ethereum, and more) • Crypto-to-fiat and crypto-to-crypto conversions • Real-time exchange rate updates Advanced Analytics • Portfolio performance charts and graphs • Asset distribution analysis • Historical performance tracking • Risk assessment tools Transaction Management • Record and manage buys, sells, transfers, and exchanges • Advanced search and filtering options • Edit and delete existing transactions • Automatic profit/loss and cost basis calculations Smart Calculator • Advanced calculator with currency conversion • Portfolio math and ROI calculations • Percentage analysis and profit calculations • Multi-currency mathematical operations Portfolio Tools • Asset rebalancing recommendations • Diversification analysis • Investment planning tools • Risk management features Why Choose Blockfolio • Clean, intuitive interface for beginners and advanced users • Real-time data from reliable sources • Comprehensive portfolio and wallet tracking • Professional-grade analytics • Secure and private — your data stays on your device • No account registration required • Works offline for basic features Perfect for cryptocurrency enthusiasts, investors, and anyone looking to manage both digital and traditional currency investments in one place. Download Blockfolio today and take control of your financial portfolio with confidence.
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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
Victory Native
React Query
React Navigation
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.
