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
Altfolio
Alt(ernative)folio is the perfect tool to have instant access to your net worth across alternative investments like precious metals and crypto currencies! Track your gains/losses with the transaction management featu...
$5.99 · In-app purchases
PRICE
$5.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.0
24 ratings · Top 30%
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 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 Altfolio: 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
Allow users to create custom investment categories and tags.
Assumption to check: Limited customization options for tracking investments
Validate with people who use this workflow before building.
Hypothesis 2
Streamline account linking process with better user guidance.
Assumption to check: Difficulty in linking multiple accounts
Validate with people who use this workflow before building.
Hypothesis 3
Implement a customizable dashboard with user preferences.
Assumption to check: Overwhelming data presentation
Validate with people who use this workflow before building.
Hypothesis 4
Integrate machine learning for automatic categorization of transactions.
Assumption to check: No automatic transaction categorization
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
Alt(ernative)folio is the perfect tool to have instant access to your net worth across alternative investments like precious metals and crypto currencies! Track your gains/losses with the transaction management features! If you have no historical record of your purchases, no problem! Just specify the quantity of the asset and Altfolio will even let you track transactions from that point forward. Use the "Quick Shift" feature to convert between crypto without having to calculate fiat transaction amounts. Great for ShapeShift users. Altfolio will also calculate the "average price" for your assets to track your dollar-cost averages. Precious Metals * Gold * Silver * Platinum * Palladium A cryptocurrency picker are available for you to choose virtually any coin just by searching for the symbol. Tools * CSV Import/Export * Landscape view displays prices in Bitcoin and local fiat Reporting Features (More coming) * Buy Transactions / Year * All Transactions across all assets * Tag your assets so they're grouped together in a tagged asset report. ex: grouping Ethereum and Ethereum Classic Security Features * Touch ID Support Supported Currencies * BTC * USD * EUR * GBP * JPY * AUD * CNY * CAD Price data sources: https://www.cryptocompare.com https://www.coinmarketcap.com https://www.cryptocoincharts.info Follow @altfolioapp on twitter for updates!
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-native-chart-kit
@react-native-async-storage/async-storage
redux
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.
