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.
budgetesf – easy, simple, fun budget tracking
$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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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 BudgetESF: 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 tracking recurring transactions
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited budgeting features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Poor integration with bank accounts
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of user-friendly analytics
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.
budgetesf – easy, simple, fun budget tracking budgetesf is a straightforward, easy-to-use budgeting app designed to help you track spending, stay within limits, and understand where your money goes — without having to use a spreadsheet. whether you budget monthly for regular expenses, or with a fixed duration for projects and events, budgetesf gives you the flexibility and clarity you need to stay in control of your finances. key features: + create flexible budgets choose between four budget types: monthly, weekly, other, or plan. define start and end dates, budget amounts, and categories that fit your lifestyle. + monthly and weekly budget types use these for regular expenses. the budget remaining amount will reset at the start of each month, or week, based on the budget type. + other budget type the other budget type can be used for expenses in a fixed period of time. the budget remaining amount will be based on all purchases added to this budget. + budget planning the plan budget type can be used for planning a budget for a particular project or event, (e.g. home maintenance project, birthday party, location photoshoot, or vacation). the budget amount field can be left blank at budget creation. add expense items with or without purchase amounts. as you fill in the list of expenses and add purchase amounts, the spent/cost amount will tally all expenses, aiding in determining a proper budget amount. + track purchases effortlessly log purchases quickly and assign them to a budget from the home screen, or from within a budget. each expense is recorded with a name, amount, and date for accurate tracking. optional tags and notes can also be added. + automatic spend calculations see how much you’ve spent and how much budget remains — automatically calculated based on your budget type and timeframe. + clear budget summaries view detailed budget breakdowns, including: total spent, remaining balance, time-based spending (monthly, weekly, or overall) + organized purchase history purchases are grouped by month and sorted by date, making it easy to review spending patterns over time. + edit and manage budgets update budget details, adjust amounts, or delete budgets as your needs change. + reporting export your budget and purchase data in pdf format, or csv format, for personal records or further analysis. + privacy-friendly by design your data stays on your device. no accounts, no subscriptions, and no unnecessary data collection. + designed for simplicity budgetesf focuses on clarity, speed, and ease of use. there are no complicated charts or overwhelming dashboards — just the information you need to make better financial decisions.
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.