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.
Stop guessing where your money went
$0.99 · 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 CoreSpend: 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.
Stop guessing where your money went. Start telling it where to go. CoreSpend is the ultimate personal finance companion for those who value speed, visual clarity, and absolute privacy. In a world of complex, data-hungry apps, it stands out as a clean, powerful budgeting app that puts you back in control—without the monthly subscriptions. Whether you need a reliable expense tracker for daily coffee or a comprehensive financial tracker for yearly trends, CoreSpend makes it effortless, beautiful, and 100% private. THE PRIVACY PROMISE Your financial data is your business, not ours. • Zero Sign-Ups: No accounts. No emails. No passwords. • 100% Private: Your data stays on your device and syncs securely via your personal iCloud. • No Data Selling: You are the customer, not the product. • No Subscriptions: One-time purchase, lifetime ownership. WIDGETS & LOCK SCREEN Your money, visible before you even open the app. • Home Screen Widgets: Balance, Budget Left, Today's Spending, Savings Goals, Upcoming Bills and a full Yearly Overview. • Lock Screen Widgets: Check your balance at a glance, or tap once to log a transaction. SIRI & SHORTCUTS Log money without touching your phone. • "Hey Siri, add a 12 dollar expense for lunch." • Ask Siri for your balance, today's spending, or how much is left in any category. • Add to a savings goal or check its progress by voice. • Long-press the app icon for instant Add Expense, Add Income and Balance actions. VISUAL ANALYTICS A full analytics screen that turns numbers into understanding. • Spending by Category and Income by Source, as clear donut charts. • Monthly income vs expenses, plus your Savings Rate over time. • Daily spending with an average line, and Average Spend by Weekday. • Budget vs Actual, Category Trends, Top Transactions and Savings Progress. CALENDAR VIEW See your month the way you actually live it. • Daily Activity: a color-coded calendar showing income and spending on every day. • Monthly Activity: a year-at-a-glance grid of every month. • Tap any day or month to see what happened—then tap a transaction to edit it. BUILT-IN CALCULATOR Type 24+18.50 straight into the amount field and CoreSpend does the math for you. RECURRING TRANSACTIONS & AUTOMATION Master your cash flow. Stop re-entering the same data every month. • Auto-Apply Logic: Rent, salaries, and subscriptions are logged automatically on their due date. • Flexible Frequencies: Daily, Weekly, Bi-weekly, Monthly, or Yearly. • Status Badges: Instantly see what's Active or Paused. CUSTOM MONTH START Budgeting shouldn't be restricted to the 1st of the month. • Align with your Payday: Set your financial month to start whenever you get paid (e.g., the 9th or 25th). • Seamless Transition: Your dashboard, calendar and analytics all follow your real budget period. SMARTER SAVINGS & GOALS The most accurate financial forecasting in any money manager. • Realistic Projections: Goal dates are calculated from your entire contribution history, accounting for skipped months. • Manual Override: Plan for a raise or a tighter month by setting your own monthly contribution. • Visual Progress: Track your "Piggy Banks" with beautiful, color-coded progress bars. WHY CORESPEND IS THE BEST BUDGETING APP • Lightning Fast Entry: Log any transaction in under 2 seconds. • Budget Limits: Set monthly ceilings for any category and get alerted as you approach them. GLOBAL BY DESIGN CoreSpend supports 31 Languages and 34 Currencies, including: • Languages: English, Spanish, French, German, Japanese, Hindi, Turkish, Italian, Portuguese, and more. • Currencies: USD, EUR, GBP, JPY, INR, CHF, TRY, PLN, SEK, NOK, DKK, and more. CoreSpend is more than a spending tracker—it's your path to financial freedom. Download CoreSpend today and master your money.
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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 it difficult to manage multiple accounts and track various categories effectively.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of visual analytics and reports.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchase options may be unclear or limited.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Manual transaction entry can be tedious.
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.