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 Fidelity Investments: 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: Complex navigation and cluttered UI may overwhelm users.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Slow loading times for market data updates.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited customization options for accounts and watchlists.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchases are not clearly explained.
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.
Our award-winning app gives you professional insights & powerful tools to help you make smarter money decisions. • Invest in stocks, ETFs & mutual funds using industry-leading research & analysis • Trade & transfer cryptocurrencies like bitcoin & ethereum with Fidelity Crypto® Cash management • Trade, transfer, deposit checks & pay bills • Schedule transfers & automate investments Alerts & notifications • Receive timely alerts & set price triggers to help manage your stock trading 24/7 support & account protection • Get state-of-the-art security in 2-factor authentication & voice biometrics • Chat with a Virtual Assistant at any time Looking to manage your workplace benefits? Download our NetBenefits® app. DISCLOSURES Before investing, consider the funds’ investment objectives, risks, charges, & expenses. Contact Fidelity for a prospectus or, if available, a summary prospectus containing this information. Read it carefully. $0 commission applies to online US equity trades & ETFs for Fidelity Brokerage Services LLC retail clients. Sell orders are subject to an activity assessment fee (historically from $0.01 to $0.03 per $1,000 principal). Other exclusions & conditions may apply. A limited number of ETFs are subject to a transaction-based service fee of $100. See full list at Fidelity.com/commissions. When you open a new Fidelity retail brokerage account, we automatically put your uninvested cash into the Fidelity® Government Money Market Fund unless you choose another option. Brokerage accounts and cash invested in a money market fund are not FDIC insured. You could lose money by investing in a money market fund. Although the fund seeks to preserve the value of your investment at $1 per share, it cannot guarantee it will do so. An investment in the fund is not a bank account & is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Fidelity Investments & its affiliates, the fund’s sponsor, is not required to reimburse the fund for losses, & you should not expect that the sponsor will provide financial support to the fund at any time, including during periods of market stress. Fidelity advisors are licensed with Strategic Advisers LLC (Strategic Advisers), a registered investment adviser, & registered with Fidelity Brokerage Services LLC (FBS), a registered broker-dealer. Whether a Fidelity advisor provides advisory services through Strategic Advisers for a fee or brokerage services through FBS will depend on the products & services you choose. Fidelity Crypto® is offered by Fidelity Digital Assets®. Investing involves risk, including risk of total loss. Crypto is highly volatile, can become illiquid at any time, & is for investors with a high risk tolerance. Crypto may also be more susceptible to market manipulation than securities. Crypto is not insured by the Federal Deposit Insurance Corporation, the Securities Investor Protection Corporation, or any other government agency, & is not an obligation of any bank. Investors in crypto do not benefit from the same regulatory protections applicable to registered securities. Fidelity Crypto® accounts & custody & trading of crypto in such accounts are provided by Fidelity Digital Assets, National Association, which is a national trust bank. Brokerage services in support of securities trading are provided by Fidelity Brokerage Services LLC (FBS), & related custody services are provided by National Financial Services LLC (NFS), each a registered broker-dealer & member NYSE & SIPC. Neither FBS nor NFS offer crypto as a direct investment nor provide trading or custody services for such assets. Fidelity Crypto & Fidelity Digital Assets are registered service marks of FMR LLC. Fidelity Brokerage Services LLC, Member NYSE, SIPC, 900 Salem Street, Smithfield, RI 02917 1221167.5.0
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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.