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
Snowball Analytics
Snowball Analytics combines portfolio analysis and dividend tracking for long-term investors
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
2,192 ratings · Top 5%
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 included18 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 Snowball Analytics: 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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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
Snowball Analytics combines portfolio analysis and dividend tracking for long-term investors. Bring your investment accounts together and see your whole portfolio in one place: stocks, ETFs, funds and crypto across 70+ exchanges and 30+ currencies. TRACK ALL YOUR INVESTMENTS - Link your brokerage accounts or import broker statements - Combine several portfolios into one overview - Watchlists and quotes for the stocks you follow DIVIDEND TRACKER AND CALENDAR - Automatic dividend tracking for every holding - Dividend calendar with upcoming and received payouts - Dividend income, dividend yield and yield on cost - Custom withholding tax - Dividend rating and top dividend stocks - Alerts for key dividend events (paid plans) PORTFOLIO PERFORMANCE - Performance that includes fees, dividends and trades, with money-weighted returns (IRR) - Diversification by sector, asset class and region - Metrics such as P/E, Beta and Sharpe ratio - Compare your results with benchmark indices - Calendar of earnings, dividends and splits PORTFOLIO INSIGHTS A personalized analysis of your portfolio right on the dashboard: spot concentration risks and see which holdings lag the benchmark. AI CHAT Ask questions about your portfolio and get answers based on your own holdings. HOME SCREEN WIDGETS See your portfolio value, dividends and top movers at a glance. GOALS Set a target for portfolio value or passive income and track your progress. PRIVACY Snowball Analytics does not store your brokerage usernames or passwords. PLANS Every new account starts with 14 days of full access for up to 2 portfolios. After that, you can stay on the free plan with 1 portfolio and up to 10 holdings, or upgrade. Paid plans (Starter, Investor and Expert) unlock more portfolios, unlimited holdings and advanced analytics. Snowball Analytics is not a broker or a registered investment advisor and does not provide investment advice. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
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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 smoother onboarding process with better error handling.
Assumption to check: Users find it difficult to link multiple accounts seamlessly.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance analytics features and provide more detailed reports.
Assumption to check: Limited insights compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 3
Optimize background fetching and notification delivery.
Assumption to check: Users report issues with notifications not being timely.
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 Native
Expo
Supabase
Victory Native
React Navigation
BUILD KIT DIFFICULTY
Advanced
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.
