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.
App Overview
Keyboard Sounds App: KeyJoy
Key Joy is a custom iOS keyboard with mechanical sound packs, beautiful themes, haptic feedback, multilingual typing, and a full emoji picker
$2.99
PRICE
$2.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 ratings · Top 5%
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.
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A product spec, screen plans, and build steps for your coding agent.
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What's included
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Key Joy is a custom iOS keyboard with mechanical sound packs, beautiful themes, haptic feedback, multilingual typing, and a full emoji picker. Every keystroke can click, thock, or whisper - with haptics to match. SOUNDS THAT FEEL PHYSICAL Choose from clicky, tactile, linear, ASMR, and typewriter sound packs. Turn sounds and haptics on or off, adjust the volume, and hold a key for a satisfying press preview. BEAUTIFUL KEYBOARD THEMES Switch between dozens of keyboard styles, including matte black, snow, sakura, wood, cyberpunk, navy, and more. Choose Classic chunky keycaps or Soft iOS-style glass keys. TYPE IN YOUR LANGUAGE Enable the languages you use and quickly switch between them directly from the keyboard. Supports: • English • Español • Français • Deutsch • Português • العربية • Русский • Italiano • Bahasa Indonesia • Türkçe Hold a letter and slide to choose accented characters and special variants. CUSTOMIZE YOUR SPACE BAR Make your keyboard yours. Add your name, an emoji, or any custom text to the Space Bar — or use the selected language’s default label. BUILT FOR REAL TYPING Use Key Joy in Messages, Notes, Mail, social apps, and anywhere else you type. • Word suggestions • Full emoji keyboard with recent emojis • Auto-capitalization • Double-tap Space for a period • Double-tap Shift for Caps Lock • Hold Space to move the cursor • Key press previews • Adjustable typing volume • Optional haptic feedback PRIVATE BY DESIGN Nothing you type is stored or sent. Key Joy does not use the network. Full Access is used only to enable features such as sounds and haptics while typing in other apps. EASY TO SET UP Add Key Joy in Settings, enable Full Access, then press and hold the globe key and choose Key Joy. Make typing sound better. Feel better. Look better. Privacy policy: https://digitalhole.github.io/DHPrivacy.html Standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
BUILD KIT DIFFICULTY
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.
