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.
The easy way to spend, save, and invest.
Free · In-app purchases
Evidence scope: #26 is the current overall US Free chart position. 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 Cash App: 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 experience security concerns over money transfer apps.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Transaction delays can frustrate users.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited investment options compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: User interface can be overwhelming for new users.
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.
The easy way to spend, save, and invest. Pay anyone in cash or bitcoin instantly and enjoy free Lightning Network transfers with compatible wallets. Start saving by rounding up spare change to the nearest dollar or invest in stocks, ETFs, or bitcoin.**** Experience a faster, simpler way to bank.* Set up direct deposit and get your paycheck up to 2 days early. Order a customizable debit card for free** and add it to your digital wallet. Save on everyday spending with exclusive offers. Download Cash App and create an account in minutes. CASH APP FEATURES P2P PAYMENTS • Send & receive money or bitcoin for free instantly • Pay people using their phone number, email, $cashtag, or QR code • Keep your money safe from fraud with advanced security features CUSTOMIZABLE DEBIT CARD • No hidden fees: Your card works where Visa® is accepted • Customizable: Make it personal & add it to your digital wallet • Safe & secure: Receive real-time transaction alerts & 24/7 fraud monitoring • Instant discounts: Save on spending & check out securely in person & online SIMPLIFIED BANKING SERVICES* • Set up direct deposit & get paid up to 2 days early • Get paid in bitcoin with no fees • No monthly balance minimums or activity requirements • Withdraw from in-network ATMs for free when you earn Green status*** • No overdraft fees & up to $200 in free overdraft coverage on Cash App Card transactions when you qualify for Green status *** EXCLUSIVE DISCOUNTS & SAVINGS • Earn up to 3.25% when you have Green status*** • Round up your spare change to the nearest dollar to start saving • Enjoy exclusive discounts on top brands & events with your Cash App Card • Get access to concert presales & exclusive events STOCK & BITCOIN INVESTMENTS • Buy stocks with no commission fees • Automatically buy bitcoin with zero fees, zero spread • Buy stock & bitcoin with custom orders or auto invest Cash App offers simplified financial services for everyone 13 and up with an account sponsored by a parent or guardian.***** Do more with your money and download Cash App today. — *Cash App is a financial services platform, not a bank. Banking services provided by Cash App's bank partner(s). Prepaid debit cards issued by Sutton Bank, Member FDIC. Cash App Visa® Debit Flex Cards issued by Sutton Bank, Member FDIC, and The Bancorp Bank, N.A., pursuant to a license from Visa U.S.A. Inc. See terms and conditions at cash.app/legal. Discounts, Round Ups, Direct Deposit, Offers, Savings, P2P and Cash App Green features provided by Cash App, a Block, Inc brand. Offers may not be affiliated with third party merchants. **Card use fees apply. Free cards come in black or white. ***Customers can qualify for Cash App Green by spending $500 in Qualifying Purchases using your Cash App Card or Cash App Pay per month, or by depositing $300 of Qualifying Deposits per month. Eligibility restrictions apply to some benefits. See Terms and Conditions for more information on borrowing, free overdraft coverage, savings interest, free in-network ATM withdrawals. ****Brokerage services by Cash App Investing LLC, subsidiary of Block, Inc. For additional information, see cash.app/CAIdisclosures. Bitcoin services provided by Block, Inc. Bitcoin services are not licensable activity in all U.S. states and territories. For additional information, see Bitcoin disclosures. Additional fees for securities may apply such as regulatory fees and fees to transfer securities externally. See house rules for details. *****Teens 13 to 17 can use Cash App with sponsorship by an eligible parent or guardian. See eligibility requirements at cash.app/legal. Contact Cash App Support by phone at (800) 969-1940 or mail at: Block, Inc. 1955 Broadway, Suite 600 Oakland, CA 94612
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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.