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.
Now available in English and Spanish!
$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.
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 Lemons: Learn Accounting: map the core Education 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: Lack of user engagement through gamification
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited offline access to course materials
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inadequate progress tracking features
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No community or support features
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.
Now available in English and Spanish! Master Accounting by Running Your Own Business! Stop being intimidated by debits, credits, and balance sheets. Lemons: Learn Accounting is a fun, engaging simulation game that teaches you real-world bookkeeping and financial principles by letting you run your own lemonade stand. Don’t just tap away - learn with a real accounting engine. Every action you take, from buying supplies to paying rent, generates a double-entry journal entry in the background. You'll make strategic business decisions and see the immediate financial impact, tracing the transactions through financial reports. Core Gameplay • Run Your Stand: Start with initial capital and manage your day-to-day operations. • Manage Inventory: Buy your supplies (lemons, sugar, and cups) and watch your inventory levels. • Set Your Price: Analyze your costs and market conditions to set your daily lemonade price. The game even simulates price elasticity to affect demand! • Grow Your Business: Use your profits to purchase strategic upgrades, improve your recipe, buy advertising or invest in a larger stand, or even hire an assistant to boost your sales potential. • Handle Events: React to dynamic market changes, like supply shortages or local festivals, that affect your costs and customer traffic. See Your Live Financial Reports This is where the learning happens. You have full access to a real-time ledger that updates with every transaction. • P&L Ledger (Income Statement): See a clear breakdown of your daily Sales Revenue versus your Expenses (like COGS, Rent, and Salaries) to find your Net Profit or Loss. • Balance Sheet: Get a snapshot of your business's health. Watch your Assets (Cash, Inventory) and Liabilities (Loans, Accounts Payable) change as you play, all balanced against your Equity. • Cash Book: Learn the vital difference between profit and cash. This report tracks your actual cash movements (Cash In vs. Cash Out) for the day. • Trial Balance: For aspiring accountants, you can view the full Trial Balance to confirm that your total Debits equal your total Credits. A Classroom in Your Pocket We built this game to be a powerful learning tool for students, business owners, or anyone curious about finance. • "Bookkeeping 101" Tutorial: A fully interactive, guided tutorial that walks you step-by-step through the fundamentals. You'll post your first journal entries for capital, purchases, and sales, learning why a debit increases an Asset and a credit increases Equity. • Test Your Knowledge: As you play, you'll be presented with daily quiz questions to test your understanding. With 127+ questions spanning Beginner to Expert, you'll master concepts from basic definitions to financial ratios. • In-Depth Learning Guide: Access a built-in 20+ page instruction manual explaining key concepts like "What is Bookkeeping?," "The P&L Statement," "Markup vs. Margin," "Working Capital," and "Depreciation". • Accounting Dictionary: A handy in-app dictionary to look up terms like "Accounts Payable," "COGS," or "Intangible Asset" whenever you need. Whether you're a student who wants to ace your next exam or just want to finally understand what "debits" and "credits" really mean, this is the most fun you'll ever have learning accounting. Download now and turn your lemons into a lesson!
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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.