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.
Simply Finance is a private budget tracker you buy once and own
$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.
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Combine features and design from your favorite apps.
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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 Simply Finance: 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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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 due to too much information at once.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Users may struggle to categorize transactions accurately.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Budget tracking can be tedious and prone to errors.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchases can be a barrier to entry.
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.
Simply Finance is a private budget tracker you buy once and own. No subscription, no ads, no account, no bank login. Everything in the app is included. WHAT YOU GET • A daily brief on Home: what may be safe to spend, what changed since last month, what is due next, and how long your cash lasts • Budgets by category — daily, monthly, or yearly — with spent and remaining amounts • Recurring bills and income, with reminders • Debt payoff dates and estimated interest • Savings goals and the pace you need to hit them • Cash flow, net worth, spending, category, and tag reports • Ask AI: questions about your own finance history, answered on-device where supported or through a provider you configure with your own key. Cloud AI is off by default. • Widgets and Shortcuts, including Auto Transaction rules for supported bank alert text • 150+ currencies with editable exchange rates • Light and dark mode on iPhone and iPad PRIVATE BY DESIGN • Your ledger lives on your device and works offline • No account, no analytics, no behavioral tracking • Encrypted sync across your devices is included. Relay operators cannot read your records, and you can run your own relay. • Export your data any time BRING YOUR HISTORY Import from YNAB, Mint, Monarch, Copilot, Tarsi, or any CSV — including bank statements with Debit and Credit columns. Preview accounts, categories, dates, and duplicates before saving; importing the same file twice never duplicates entries. Automatic bank feeds are not included: entry is manual, imported, or from alert-text rules. ONE PRICE, EVERYTHING INCLUDED Buy once. Every feature and every update, with nothing to unlock later. Already have Simply Finance? This update is free and unlocks everything for you too. Optional managed relay hosting from SimplySync Cloud is a separate service with its own terms. The built-in relay and self-hosting are always available.
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.