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
Hoopa City 2
**From the makers of the award winning app Dr
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.3
222 ratings · Top 30%
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 Hoopa City 2: map the core Education 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
Incorporate more diverse buildings and challenges.
Assumption to check: Limited building options and repetitive gameplay
Validate with people who use this workflow before building.
Hypothesis 2
Add more interactive learning elements and mini-games.
Assumption to check: Lack of educational depth
Validate with people who use this workflow before building.
Hypothesis 3
Optimize graphics and resource management for better performance.
Assumption to check: Performance issues on older devices
Validate with people who use this workflow before building.
Hypothesis 4
Offer a freemium model with in-app purchases for additional content.
Assumption to check: High price point for initial purchase
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
**From the makers of the award winning app Dr. Panda Restaurant 2. Build the city of your dreams! Combine materials to make houses, roads and more! HOOPA CITY IS BACK! Hoopa City is bigger and better than ever! Create a thriving metropolis with sky-high apartments and shopping malls, or a paradise beach retreat with harbors over sparkling waters! BUILD THE CITY OF YOUR DREAMS! Build any type of city you dream up, and explore it in a beautiful 3D world! Combine 8 different world-building elements to make train tracks, homes, shops, airports and more! DISCOVER, EXPERIMENT AND UNLOCK! Each building takes a special combination to discover and unlock, so you have the freedom to experiment and build in any way you want! Can you find all of the secret combinations? SO MANY WAYS TO PLAY IN YOUR CITY! Explore the city you've created by playing inside of each building. Go shopping in the mall, get married at the City Hall or ride on a dinosaur in the museum! Hoopa City 2 is designed with kids in mind, but people of all ages can play and have fun! KEY FEATURES: ● Build bigger than ever in full 3D! ● Tap, rotate and pinch to zoom to see your city from all different angles. ● Experiment with 8 world-building elements to discover and unlock over 60 buildings! ● Explore the inside of buildings and play with the surroundings ● Dress-up your citizens with fun clothes and accessories! ● Switch between Night and Day Mode and watch your city light up! ● Hoopa's Building Book will keep track of what you've unlocked and how to build it. ● Save over 20 cities, so you can always try something new! ***Requires iPad 2 or newer, iPhone 5 or newer to run*** Privacy Policy As a designer of kids’ games, we understand how important privacy is in this modern, digital world. You can read our privacy policy here: http://www.drpanda.com/privacy About Dr. Panda Dr. Panda is a developer of games for kids. We develop games with educational values that help kids learn about the world. All of our games are safe and do not contain inappropriate content. If you’d like to know more about us and how we design games for kids, visit our website www.drpanda.com/about. If you have any questions, feel free to send us an email at [email protected] or contact us on Facebook (www.facebook.com/drpandagames) or Twitter (www.twitter.com/drpandagames) or Instagram (www.instagram.com/drpandagames).
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-native-maps
expo-image-picker
expo-navigation
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.
