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.
@pie tax the self assessment 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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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 @Pie Tax: 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 it hard to keep track of multiple deductions and transactions
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of personalized insights into tax savings
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Manual entry of transactions can be tedious
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Difficulty in understanding tax categories
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.
@pie tax the self assessment app. from getting a tax-rebate to submitting your self assessment and making your whole financial future a healthy-one – downloading the app and subscribing to pie gives you this little lot: - real time bill and tax projections: see what you owe or is owed to you, live at any time - bookkeeping: with our revolutionary 'smart match' feature reconciling your business expenses has never been easier! you can also upload receipts to ensure your tax return is 100% hmrc safe - expert advice from humans: our tax assistants are here to help every step of the way, at a time convenient to you. like an accountant in your pocket - direct submission to hmrc: every detail of your tax return is taken care of, allowing you to submit directly to hmrc - invoicing: one place to create, send and track invoices to your clients - multiple incomes in one place: import your income and outgoings across multiple income streams (wages, side hustle, rental income, capital gains, overseas income, dividends & interest, or anything else - pie has it covered) it’s your money, keep it. pie money limited is acting as an agent of truelayer, who is providing the regulated account information service, and is authorised and regulated by the financial conduct authority under the payment services regulations 2017 and the electronic money regulations 2011 (firm reference number: 901096)
Written user reviews are not shown here. Check current App Store reviews >
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.