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.
Don’t let overdraft fees or pending transactions catch you by surprise - always know exactly what your account balance is with Balance My Checkbook! All you have to do is enter your expenses and income and let the app...
Free · 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 Balance My Checkbook: 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Don’t let overdraft fees or pending transactions catch you by surprise - always know exactly what your account balance is with Balance My Checkbook! All you have to do is enter your expenses and income and let the app do the rest. Save Time: Auto complete transactions Powerful Search to find transactions instantly Easy scheduling for recurring transactions Stay Up To Date: Track which transactions have cleared Sync between other users and devices "Sync for 4 Users" is an auto-renewing monthly subscription more details below * Export your data and balance Easy to Use and Customizable: Get started in a minute Create your own transaction types Fast Support is just a tap away * The "Sync for 4 Users" subscription auto-renews monthly. The subscription includes a month of access to: • Data Sync • Store up to 10 years of transactions • Priority Support It also includes access to all premium features: • Unlimited Accounts • Recurring Transactions • Lock Screen • Transaction Search • Transaction Filter • Export Data • No Ads ** Terms and Conditions for Auto-renewing subscriptions • Payment will be charged to iTunes Account at confirmation of purchase • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Terms and Conditions for App: http://lingsdesigns.com/balancecheck/terms.html *** This version is ad supported but ads can be removed with an in app purchase.
Written user reviews are not shown here. Check current App Store reviews >
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 find manual entry tedious and error-prone.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Some users report difficulty in tracking budgets effectively.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited support for recurring transactions.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Users desire better graphical representation of financial data.
Validate with people who use this workflow before building.
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.