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.
PennyFi — your money, in your pocket, on your terms.
$4.99 · 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 PennyFi: 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 find finance apps overwhelming with too many features.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Security concerns with linking bank accounts.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Difficulty in understanding budgeting tools.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchase confusion and pricing transparency.
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.
PennyFi — your money, in your pocket, on your terms. Pay once, own it forever. No subscriptions, no bank logins, no ads. Your finances stay on your device — and PennyFi's smart features run on Apple's on-device AI, so nothing you enter ever leaves your hands. KNOW WHAT YOU CAN SPEND • Safe to Spend: one number that answers "can I buy this?" — what's left after bills, budgets, and goals • Cash flow forecast: see your balance weeks ahead, before the bills hit • A customizable Home dashboard: net worth, cash on hand, upcoming bills, top expenses, and more BUDGET YOUR WAY • Guided Budget Builder: answer a few questions, get a working budget • Classic methods (50/30/20 and friends) or fully custom categories • Budget calendar, spending pace, and gentle alerts before you overshoot • Budget together: share accounts and budgets with your partner over iCloud — you both view and edit, no extra account needed EVERY ACCOUNT IN ONE PLACE • Cash, savings, credit cards, loans, and investments — in any mix of currencies • Savings interest tracking, debt payoff strategies (avalanche or snowball), and loan payments with an adjustable interest–principal split • Investment portfolios with live prices and performance history EFFORTLESS ENTRY • Scan a receipt — amount, payee, and line items are filled in by on-device AI • Import bank statements from CSV or PDF, with smart duplicate detection • Rules auto-categorize as transactions arrive; PennyFi even suggests the rules • Split one purchase across categories, tag anything, log by voice with Siri • Review: sweep new transactions in a quick card session — and note how the spending felt UNDERSTAND YOUR MONEY • Ask PennyFi anything about your spending — answered privately, on your device • Smart Insights that stay calm: snooze them or dismiss them for good • Spending anomaly alerts, subscription detection, weekly recap, no-spend streaks, age of money • Reflect: beautiful reports on where it all went, month by month and year by year LIFE ADMIN, HANDLED • Recurring bills with reminders, calendar sync, and a Live Activity for the next bill due • Shared expenses with friends and settle-up math done for you • Savings goals with target dates and progress you can see PRIVATE BY DESIGN • No bank connections — that's a feature: nothing to breach, no credentials to hand over • Face ID / Touch ID app lock • iCloud sync across your iPhone, iPad, and Mac; local backups and full CSV export any time — your data is yours to keep AT HOME ON EVERY DEVICE • Built natively for iPhone, iPad, and Mac • Widgets for Safe to Spend, net worth, and more • Siri Shortcuts, global search, and full keyboard support on Mac • Available in 30 languages One price. Every feature. Forever. That's the deal.
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.
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.