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.
$quirrel Budget & Finance is built around how real people get paid — by paycheck, not calendar month
$7.99 · 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 $quirrel - Budget & Finance: 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: Difficulty in managing multiple accounts effectively.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited customization options for budgets.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of notifications for budget limits.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Potentially confusing navigation for new users.
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.
$quirrel Budget & Finance is built around how real people get paid — by paycheck, not calendar month. Plan each pay period, track every dollar, manage debt payoff strategy, organize grocery shopping, and see your complete financial picture in one connected dashboard. Version 1.4 expands $quirrel into a full personal finance toolkit: BUDGET COMMAND CENTER Build budgets by pay period. Grouped categories make it easy to see Home & Bills, Food, Transportation, Savings, and Debt at a glance. Copy budgets from real date ranges — no more guessing what "previous period" means. GROCERY GETTER Plan shopping trips right inside the app. Build lists by store section, track estimated vs. actual prices, manage quantities, and post your final grocery total directly to your ledger and budget. Your Smart List remembers prices so future trips get faster. EXPANDED REPORTS Five views — Overview, Spending, Debt, Trends, and Custom. Real donut charts show your share of wallet by category. Cash flow bars, income vs. expense trends, debt principal movement, savings rate tracking, and category drilldowns give you a clearer picture of where your money actually goes. DEBT PAYOFF PLANNER Compare Avalanche and Snowball strategies side by side. See your payoff timeline, extra payment impact, amortization schedules, principal reduction tracking, and recent debt payment history. LEDGER Add transactions, income, transfers, and debt payments. Edit transactions after the fact. Mark transfers as budget-aware so sinking fund moves count toward your budget correctly. NO BANK CONNECTION REQUIRED Your data stays on your device. Optional cloud sync available for household sharing. No subscriptions. No data selling. No ads. $quirrel is simple enough for daily use and deep enough to replace several separate finance apps.
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.