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.
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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 Mine (formerly Fizz): MoneyGPT: 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 find finance apps overwhelming and confusing
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Many users report inaccurate transaction categorization
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Subscription models can be unclear
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited integrations with banks
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.
Mine is the #1 credit and money app trusted by 600k+ young adults. Named the best credit builder by Business Insider, Mine is there for you in college and beyond. ALL-IN-ONE FINANCIAL SOLUTION FOR YOUNG ADULTS Whether you want to build credit, manage your money or have no idea where to start, Mine is there to help you every step of the way. Mine is free to download giving you all the tools you need to succeed. BUILD CREDIT THE EASY WAY Mine members get a debit card that builds credit with no interest, hidden charges or late fees. To get started, simply connect your bank account and get a spending limit based on how much money you have. With daily autopay, your card gets paid off every day so you never have to worry about overspending. CHECK YOUR CREDIT SCORE FOR FREE WITH NO HARD PULLS Check your score and stay on top of any changes. Don’t have a score yet? Mine will walk you step-by-step through the process of establishing your credit score. KNOW WHERE YOUR MONEY GOES Find out exactly where all of your cash goes every month. See your money trends, set category limits to stop you from spending too much and get a custom budget based on your personal history. LEARN THE THINGS THEY DON’T TEACH IN COLLEGE Learning about personal finance will pay dividends throughout your life. Get access to dozens of game-like lessons on investing, credit, budgeting, and more. Not sure where to start? Take a 2-minute money GPA quiz to help guide you in the right direction. GET REWARDS AND MORE MONEY IN YOUR POCKET The Mine card comes with 3% weekly cashback on the category of your choice, fun surprises on the first Friday of every month and exclusive campus deals of up to 100% off at places like Chipotle, Starbucks, Target and more. Disclaimers: ShoulderTap Technologies, Inc. d/b/a Mine © 2024. 450 Broadway, Level 2, New York, NY 10013. All rights reserved. Mine® is registered in the U.S. Patent and Trademark Office. Mine is not a bank. The Mine Debit Mastercard® is issued by Patriot Bank, N.A., Member FDIC, pursuant to a license from Mastercard®. The Mine Visa® Debit Card (together with the Mine Mastercard, the Mine Card”) is issued by Lead Bank, Member FDIC, pursuant to a license from Visa® and may be used everywhere Visa® debit cards are accepted. Any loans offered in connection with the Mine Card are originated by Lead Bank. Any promotions or rewards offered in connection with the Mine Card are offered and managed by Mine, not our bank partners. Any servicing, brokering, and collections activity is conducted by Mine Technologies, Inc. Mine Members may choose to apply for a Mine Card, but are not required to. Mine Membership does not guarantee access to a Mine Card. Application and eligibility restrictions apply. *Customers who successfully qualify, apply for, and accept a line of credit (LOC) will receive an initial LOC between $90 and $1,000 based on info provided during underwriting. LOCs may be adjusted over time based on repayment history if criteria are met. Contact customer support to request a free LOC app. Mine cardholders: Increases or specific changes to your credit score are not guaranteed. Impact on your credit score may vary depending on your use. Mine is required to report late payments, which may negatively impact your credit score. Credit scores are independently determined by credit bureaus based on a number of factors, including your activity with other creditors. The Mine Card and related services will not remove negative credit history from your credit report. Mine, on behalf of Lead Bank, will report your activities to Experian® and Transunion® . For additional information, terms and conditions applicable to your use of Mine services visit www.usemine.com.
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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.