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.
Take control of your personal finances with Cashtra.
$2.99 · In-app purchases
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.
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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 Cashtra - Budget 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Take control of your personal finances with Cashtra. Cashtra is a privacy-first expense and budget tracker for cash, cards, bank accounts, e-wallets, bills, debts, and savings goals — with no sign-up, no bank logins, and no subscriptions. Your ledger lives on your iPhone. Log spending in seconds, plan your bills and budgets, and see your whole net worth in one place. FEATURES • Cash Chat: Type what you spent in your own words and Cashtra logs it. You can even set up your accounts by chatting. • Siri & Shortcuts: Log an expense, income, or transfer, or move money between accounts, without opening the app. Great on the Action Button or Back Tap. • Smart Safe-to-Spend: A daily allowance that adjusts to keep you on budget without stress. • Financial Center: Budgets, recurring bills, goals, and debts in one timeline, with reminders before things are due. • Net Worth: Track assets and liabilities. Add Money, Withdraw, or Record a Payment right from your accounts. • Split Expenses: Split a bill with friends and track who owes what, or split one receipt across several categories. • Savings Goals: Set target dates, watch milestone progress, and set money aside with Add to Goal. • Credit Cards & Debt Payoff: Monitor balances, limits, utilization, installments, and loan payoff progress. • Interactive Widgets: Check balances and log expenses from your Home Screen and Lock Screen. • Coach Cashtra: Smarter guidance based on your own activity. • Multi-Currency: Live exchange rates, or use your bank's own rate when it charged a different amount. • Face ID & App Lock: Keep your budget private. • CSV Import & Export: Bring in past transactions and export clean backups anytime. • Translated into 70+ languages. PRIVATE BY DESIGN • No account sign-up required • No bank logins or account syncing • Your data stays on your device. Optional iCloud Sync uses your own private iCloud database and is off by default • No ads, no tracking, and zero telemetry Cashtra is a personal budgeting and financial tracking tool. It does not provide financial, investment, or tax advice.
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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 find budgeting apps too complex to navigate.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Automatic categorization of transactions is often inaccurate.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Many apps lack customization options for budgets.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Users dislike entering transactions manually.
Validate with people who use this workflow before building.
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.
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.