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.
Stop switching to 123
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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.
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.
Stop switching to 123. Number Keys Please puts a real number row on top of your keyboard and hides a second character under every key, so numbers and symbols are always one tap or one swipe away. NUMBERS ON TOP • A full 1–0 number row above the letters, on iPhone and iPad • Prefer a shorter keyboard? Hide the row and swipe down on Q–P for 1–0 • Swipe down on any number for its symbol: ! @ # $ % ^ & * ( ) A SYMBOL UNDER EVERY KEY • Swipe down on a letter to type its symbol: brackets, quotes, slashes, currency and more • Make every key your own: pick up to 8 characters for any downward swipe, separately for English and Korean ENGLISH + 한국어 • Standard 두벌식 Hangul with compound vowels, double consonants and jamo-by-jamo delete • Hold the space bar to switch languages • Autocorrect and word suggestions in both languages, with one-tap undo LOW LAG TYPING • Median processing time in our typing engine benchmark: 0.4 ms for English and 0.2 ms for Korean (measured on a Mac; results vary by device) • Keys respond the moment your finger lands • Spell-checking runs in the background, so it never blocks a key EVERYTHING YOU EXPECT FROM A KEYBOARD • Shift, caps lock, repeating delete, two symbol pages and a smart return key • Slide the space bar to move the cursor precisely • Search more than 3,900 emoji in English or Korean, fully offline, with skin tones and recents • Optional haptics and key sounds THEMES • Classic is included and follows the light or dark keyboard iOS shows in each app • Liquid Glass, an optional one-time unlock, gives you translucent keys that swell, glow and spring back with every tap (iOS 26 or later) PRIVATE BY DESIGN • The keyboard never connects to the internet. Nothing you type is sent anywhere. • Dictionaries (8,000+ words each for English and Korean), autocorrect, suggestions and emoji search all live on your device • No analytics, no accounts, no typing data collected • Full Access is optional. It lets the app share your settings and purchased theme with the keyboard and enables optional key sounds. Without it, every typing feature still works. Try it before you install it everywhere: the app has a typing playground and a typing tester with poems and short stories to practice on. To get started, open Settings → General → Keyboard → Keyboards → Add New Keyboard and choose Number Keys Please.
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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.
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.