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.
iCheckBalance is an easy to use checkbook app and a bill tracking app in one.
$1.99 · 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 iCheckBalance: 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: Limited account types supported for linking
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Manual input for account balances can lead to errors
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of detailed transaction categorization
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No budgeting tools available
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.
iCheckBalance is an easy to use checkbook app and a bill tracking app in one. + iCheckBalance has a simple spreadsheet like interface that makes reconciling statements a snap. + Transaction rows can be moved up or down to change the sequence to match your bank statement. + New transaction rows can be inserted at the end, or above, or below an existing row. + Balance is calculated for each transaction. + Transactions not yet cleared can be marked as pending and (optionally) removed from the balance calculations. + Reconciled transactions can be flagged as such. + Quick fill feature for fast transactions entry. + Easily Transfer amounts between accounts. + Cash flow charts. + Charts deposits, deductions, and balance over day, week, month or year time periods. * Bills and payments can be tracked for multiple bill accounts. * Bills can be setup to recur weekly, bi-weekly, monthly, 6-monthy or yearly. * Bills can be viewed on calendar. * Bills can be sorted by due date. * Bills due soon and overdue are marked. * Bill payments can be deducted from an account when entering bill payment. + In-app multi-line calculator: great for calculating discounts and percentages. + Rows in calculator can be edited with all results updating like a spreadsheet. * Passcode lock for added security with option to unlock using Touch ID (or Face ID on iPhone X). * Help info in the app; no separate manual needed. + You get all the features when you buy the app and get all future updates for free. There are no in-app purchases for additional features or subscriptions to buy and no ads in the app. All data backed up on sync. You can also export account data in CSV format for reading into spreadsheets or for keeping your own backup. Get iCheckBalance and avoid late fees and bank charges by staying on top of your bank accounts, credit cards and bills.
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.