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
G-Whizz! Plus for Google Apps - The #1 Apps Browser
Join millions of users around the world in enjoying the #1 apps browser in the App Store and one of iLounge's 100 Essential Apps! G-Whizz! is the easiest way to use your favorite services and has been reimagined and r...
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.6
45 ratings · Top 50%
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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Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 G-Whizz! Plus for Google Apps - The #1 Apps Browser: map the core Social Networking 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 personalized recommendations based on user behavior.
Assumption to check: Limited app discovery features
Validate with people who use this workflow before building.
Hypothesis 2
Create a uniform design system for better user experience.
Assumption to check: Inconsistent user interface
Validate with people who use this workflow before building.
Hypothesis 3
Implement real-time updates and notifications for app activities.
Assumption to check: Push notifications are not utilized effectively
Validate with people who use this workflow before building.
Hypothesis 4
Introduce social sharing and commenting features for apps.
Assumption to check: Lack of community 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
Join millions of users around the world in enjoying the #1 apps browser in the App Store and one of iLounge's 100 Essential Apps! G-Whizz! is the easiest way to use your favorite services and has been reimagined and recreated to be easier-to-use and more useful than ever. In addition to everything that has made G-Whizz! so popular, you can now enjoy the following features: • Support for iOS 9 • Support for new iPad split screen multitasking • Support for iPhone 6/6 Plus • Easy access to your favorite Google apps, plus the most popular social apps, including Facebook, Twitter, Pinterest, Linkedin and more • Support for multiple Google accounts (finally!) • Support for more than a dozen languages • Protect your data with an app passcode • Personalize the app with infinite theme colors • Enhanced browser with the ability to share to your favorite social networks • Plus much, much more Try G-Whizz! today and discover what you've been missing! As always, if G-Whizz! makes your life a little easier, the best way to thank us is to share it with your friends! This app and content herein is © 2010-2015 G-Whizz! Apps, LLC. All rights reserved. G-Whizz!™ and the G! logo™ are trademarks of G-Whizz! Apps, LLC. Certain other trademarks and copyrights referenced in the app are the property of their respective owners.
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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
React Native
Expo
React Navigation
Axios
Zustand
Shadcn/ui
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.
