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
Larger Keyboard – Type Faster w Bigger XL Keys
##### ON TIME-LIMITED SALE #####
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 1.8
13 ratings · Below Average
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 included16 files
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.
// RORK SYSTEM PROMPT
Rork plan preview for Larger Keyboard – Type Faster w Bigger XL Keys: 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 more intuitive slider with visual feedback.
Assumption to check: Users find the keyboard size adjustment difficult to use.
Validate with people who use this workflow before building.
Hypothesis 2
Improve stability and performance, especially with text input.
Assumption to check: The app crashes frequently during keyboard use.
Validate with people who use this workflow before building.
Hypothesis 3
Add more themes and layouts for personalization.
Assumption to check: Limited customization options for key themes.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce additional features like auto-correct and suggestion settings.
Assumption to check: Poor user ratings due to lack of features.
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
##### ON TIME-LIMITED SALE ##### ##### 50% OFF ORIGINAL PRICE ##### Thanks to your support, we have achieved the following hallmarks! Top Productivity App in Slovakia – Jun 14, 2016 Top 10 Productivity App in Singapore – Jun 19, 2016 Top 20 Productivity App in Belgium – May 27, 2016 Top 100 Productivity App in Canada, United Kingdom, United States – May & Jun, 2016 Biggest keyboard in the app store! Are the standard keyboard keys too small for your fingers? Larger Keyboard enlarges the keys by more than 60%! Improve your typing speed and accuracy with Larger Keyboard today! DOWNLOAD NOW! FEATURES: • Adjustable height • Change the height to fit your own preference! • Beautiful and Professional Interface • Beautiful and large font, complete with pop-up key feedback! • iPhone + iPad Support, Landscape Mode • Larger Keyboard fits all device sizes and orientations! It's a buy-one-get-one free deal! • QWERTY Layout • Type with your familiar keyboard layout! No learning curve! • CAPS LOCK & Auto Caps • • Double tap space to insert '.' shortcut • Increase your typing productivity with the automatic period, '.' shortcut! • Dark/Light theme Automatically changes color according to the context! To install, open Settings and go to: General > Keyboard > Add New Keyboard... > Large Keyboard Please Note: Larger Keyboard does not collect any information from you. Developed by Wong Jun Ming and Cheng Wei Hong.
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
React Navigation
React Native Gesture Handler
Async Storage
Expo Slider
BUILD KIT DIFFICULTY
Intermediate
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.
