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.
You don't swing the bat
$1.99
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.
Your first Build Kit is free with a verified email.
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.
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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
You don't swing the bat. You decide who does. Baseball GM puts you behind the desk of a big-league club and leaves you there. Ownership hands you a payroll and a goal — not a blank cheque. What happens next is entirely on your judgment: who you sign, who you draft, who you rush to the majors, and who you let walk in November. Every screen is a decision, not a menu. Spend $8M on a third baseman and you'll see exactly which rating it bought you. Promote a 22-year-old catcher a year early and watch his ceiling take the hit. Hire a better medical staff and quietly stop losing arms in August. THE JOB Work inside the payroll ownership gives you and see the ratings your money actually buys Work free agency against 29 rival front offices — years, dollars, and the risk of both Scout an amateur class, build your board, and draft on ceiling or on certainty Develop prospects through a four-level farm system: promote, demote, call up, and protect them Set the lineup, batting order, rotation and bullpen roles by hand — or optimize in a tap Hire and fire coaching, scouting and medical staff, each with a real effect on development, evaluation and injuries Trade with clubs that have their own needs, budgets and windows Take a better job when it comes — your record follows you from team to team A CAREER, NOT A SEASON Baseball GM keeps your whole history: every club you've run, every division you won, every rebuild you inherited and every one you left half-finished. Twenty years in, your career page is the only scoreboard that matters. DEEP, BUT NOT A SPREADSHEET Built for the sim veterans who want ceilings, service time and development curves — and readable enough that you can run a full season on a train ride. Tap Continue and the league plays on. Everything important is two taps from wherever you are. NO NONSENSE One purchase. No ads, no energy timers, no card packs, nothing to buy twice. Plays offline. All players, teams and leagues are fictional.
Written user reviews are not shown here. Check current App Store reviews >
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.
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.
Not assessed in a Build Kit yet.
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.