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.
Binary Clock turns the time into something you actually want to look at.
$0.99
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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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.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Binary Clock turns the time into something you actually want to look at. Instead of one clock face, you get 15 completely different ways to read the time in binary — from clean BCD columns to a radial dot pattern, a scrolling "binary rain," a circuit-board layout, and more. Switch between them any time, and pick your own accent color to match your style. DESIGNS • BCD Columns, BCD Rows, True Binary, Radial • Hex Matrix, Binary Rain, Pulse Wave, Sunburst • Constellation, Circuit Board, Terminal, Stack • Hourglass, Barcode, Mosaic MAKE IT YOURS • Custom accent/dot color for every design • 12-hour or 24-hour format • Show a timezone of your choice, independent of your device's system timezone • Optional seconds display inside the app • Full RTL mirroring for right-to-left languages • 20 languages, switchable in-app — no need to change your device language WIDGETS • Home Screen widgets in Small, Medium, Large, and Extra Large • Lock Screen widgets in Circular, Rectangular, and Inline styles, supporting all 15 designs • A widget gallery inside the app with a live preview of every design before you add it Like all third-party widgets on iOS, Home and Lock Screen widgets update on the intervals iOS allows rather than live, second-by-second — open the app for a real-time, second-accurate view. Switch to the immersive full-screen clock view and the controls fade away, leaving just the time, rendered the way computers actually read it. Binary Clock is built for people who like their time a little more technical.
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.
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.