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
Animals & Coins Adventure Game
Join players around the globe in this animal adventure game
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
343,627 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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Build Kit
Make this idea yours
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 included18 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 Animals & Coins Adventure Game: map the core Games 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 balanced ad strategy with fewer interruptions.
Assumption to check: Users report too many ads interrupting gameplay
Validate with people who use this workflow before building.
Hypothesis 2
Offer more animal skins and accessories for user personalization.
Assumption to check: Limited character customization options
Validate with people who use this workflow before building.
Hypothesis 3
Introduce new levels and challenges to keep the game engaging.
Assumption to check: Repetitive gameplay can get boring
Validate with people who use this workflow before building.
Hypothesis 4
Create more affordable pricing options or bundle deals for purchases.
Assumption to check: In-app purchases can feel expensive
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 players around the globe in this animal adventure game. Build islands and bridges, raid lands, and collect treasure island coins! Explore the animal island, steal coins, and build your kingdom to become the ultimate raid master! Start the coin run, unlock new characters, and discover the animal world. Explore the animal treasure island Conquer different islands, steal coins from other players, and prove yourself as the real coin master. Play with your Facebook friends and start your next animal adventure game NOW! REVEAL DIFFERENT KINGDOM ISLANDS Build bridges, loot coins and treasures from others, and collect animal cards to develop your island. STEAL COINS & RAID LANDS You can win coins and treasures, cash, or gems by raiding other players’ animal islands. PLAY AGAINST YOUR FACEBOOK FRIENDS Attack your friends and other players, raid lands, steal coins and treasures, and defend your island from ongoing attacks. Looking for revenge? You can raid other players and steal their gold coins and treasures! COLLECT ANIMAL CHARACTER CARDS Explore islands and kingdoms and find unique animal cards. Once you finish the collection, you’ll win prizes including island coins and exclusive power-ups! Like to play multiplayer raid games? In this exciting coin game, you can raid lands and other animal islands to gain millions of treasure island coins. HOW TO PLAY ANIMALS & COINS TO BECOME THE KING OF COINS * Tap and hold to build a bridge * Release to drop the bridge onto the adjacent platform. Hold for the perfect duration to earn extra cool rewards, island coins, gems, and more! Your running animal will show you the way with every bridge you build. * Earn and collect coins from each successful bridge to spend on gear for your island. * Collect all animal cards to win exclusive prizes! Join millions of players worldwide and become the next master of coins! Animals & Coins is intended for those 18 and older. Animals & Coins does not require payment to download and play, but it also allows you to purchase virtual items with real money inside the game, including random items. You can disable in-app purchases in your device’s settings. Animals & Coins may also contain advertising. You may require an internet connection to play Animals & Coins and access its social features. You can also find more information about the functionality, compatibility, and interoperability of Animals & Coins in the above description and additional app store information. By downloading this game, you agree to future game updates as released on your app store or social network. You may choose to update this game, but if you do not update, your game experience and functionalities may be reduced. Animals & Coins does not require payment to download and play, but it also allows you to purchase virtual items with real money inside the game, including random items. You can disable in-app purchases in your device’s settings.
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
Firebase
React Navigation
AdMob
BUILD KIT DIFFICULTY
Expert
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.
