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.
Budget0 puts you in complete control of your money with zero-based budgeting — a proven method where every dollar of income is assigned a purpose, so nothing slips through the cracks.
$2.99
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
Your first Build Kit is free with a verified email.
Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Budget0: 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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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
Assumption to check: Users often struggle with manual data entry for transactions.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Budget tracking can be cumbersome without notifications.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of visual analytics may hinder understanding of spending habits.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited customization options for accounts and budgets.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Budget0 puts you in complete control of your money with zero-based budgeting — a proven method where every dollar of income is assigned a purpose, so nothing slips through the cracks. ZERO-BASED BUDGETING Start each budget by entering your income, then allocate every dollar to expenses until you reach zero. This ensures you always know exactly where your money is going and helps you save more intentionally. SMART CATEGORIZATION Choose from 31 built-in categories for income and expenses, or create your own. Budget0 features AI-powered auto-categorization that learns from your habits, so adding items gets faster over time. BUDGET GROUPS & COMPARISON Organize budgets into groups and compare them side by side. See how your spending evolves month to month with detailed comparison tables and stacked bar charts. BEAUTIFUL CHARTS Visualize your finances with interactive donut charts that break down spending by category, and drill down for more detail. Group charts show trends across multiple budgets at a glance. PDF EXPORT Generate professional PDF reports for individual budgets or entire group comparisons and share them with anyone. Budget reports are formatted in portrait, group comparisons in landscape. CLOUD BACKUP Back up your data to iCloud so you never lose your budgets. Restore anytime with a single tap. SECURITY FIRST Protect your financial data with a PIN code and optional biometric authentication (Face ID or Touch ID). Configure auto-lock to secure the app when you step away. WORKS EVERYWHERE • 25 currencies supported with proper formatting • 14 languages: English, Spanish, French, German, Italian, Japanese, Korean, Dutch, Polish, Portuguese, Russian, Swedish, Turkish, and Chinese • Fully offline — no account required, no data leaves your device ONE-TIME PURCHASE Budget0 is available for a one-time purchase of $2.99 — no subscriptions, no ads, no hidden fees. Pay once and own it forever. Download Budget0 today and give every dollar a job.
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
Not assessed in a Build Kit yet.
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.