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
Remote KeyPad and NumPad Pro
Turn your iPhone or iPad into a powerful and elegant keyboard extension with numbers and navigation pads.
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
651 ratings · Top 15%
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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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.
// RORK SYSTEM PROMPT
Rork plan preview for Remote KeyPad and NumPad Pro: map the core Productivity workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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.
Hypothesis 1
Implement a robust connection status indicator and retry mechanism.
Assumption to check: Users find Bluetooth connectivity issues frustrating.
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to fully customize button layouts and sizes.
Assumption to check: Customization options are limited.
Validate with people who use this workflow before building.
Hypothesis 3
Create an onboarding tutorial to guide new users through features.
Assumption to check: The app can be unintuitive for new users.
Validate with people who use this workflow before building.
Hypothesis 4
Provide clearer explanations of what features are included in each tier.
Assumption to check: In-app purchases can be confusing.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Turn your iPhone or iPad into a powerful and elegant keyboard extension with numbers and navigation pads. Create custom keypads for your professional tools to boost productivity. Move freely and control your computer from across the room. No line of sight is required - the app uses WiFi to connect to your computer. Setup is both quick and easy, just download the helper app from my website and install it on your computer and that's it. The app exists since 2016 and has been downloaded more than 300,000 times and received very positive reviews both from users and from the press. It's actively maintained and receives frequent updates with new and exciting features. MAIN FEATURES - Numbers block - Navigation block ADVANCED FEATURES - Create custom keypads to control apps and websites - High customization of the app interface - History of connected devices for quicker re-connection - Wake On LAN REQUIREMENTS - Mac with macOS 10.10 or newer - PC with Windows 7 SP1 or newer - Free helper app, available at https://cherpake.com/get - Shared network connection, WiFi or Personal Hotspot, see https://cherpake.com/connect
Written user reviews are not shown here. Check current App Store reviews >
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
React Native
Expo
Zustand
React Navigation
React Native Bluetooth
Shadcn/ui
BUILD KIT DIFFICULTY
Advanced
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.
