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
Evony
Shoot and engage in battles！
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.0
180,214 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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What's included19 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 Evony: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Shoot and engage in battles！ Build your cities. Train your troops. Expand your empire. Be the king of 7 kingdoms! All in Evony: The King's Return, the hottest real-time strategy MMO of 2024! Unique gameplay features: ◆ Challenge a variety of Survivor Levels ◆ Move, shoot, evolve weapons ◆ Use flexible finger controls ◆ Experience the joy of puzzle solving THE EXCEPTIONALLY RICH AND AMAZING SET OF FEATURES: ◆ YOU ARE THE SURVIVOR! Move, dodge, shoot, acquire weapons, and fight to the last moment! ◆ Choose from 7 civilizations to customize your game’s architectural style: American, Chinese, European, Russian, Korean, Arabia and Japanese! ◆ YOU ARE THE DIPLOMAT! Join a strong Alliance where you can make friends, communicate in real-time via voice and text with auto-translations so you can improve strategies and win epic battles. ◆ YOU ARE THE WARLORD! With over four types of troops to select and train from ground-pounding infantry to massive siege engines; wage epic wars, fight against your enemies and see the battles happen all around you in real-time on the stunningly animated World Map. ◆ YOU ARE THE GOVERNOR! Administrate your cities in your Empire and use your leadership skills in managing resources and research improvements to gain strategic advantages. ◆ YOU ARE THE MONARCH! Recruit famous Generals of history to help with battles and city development. ABRAHAM LINCOLN, GEORGE WASHINGTON, KING ARTHUR, CHARLES THE GREAT, JULIUS CAESAR, GENGHIS KHAN, ODA NOBUNAGA, YI SUN-SIN, and more await you to explore. See them battle across the world of Evony in real-time, capture enemy generals and use them against their own leaders! ◆ YOU ARE THE PUZZLE MASTER! For each Keep Level-up, you can solve puzzles and earn awesome rewards! Facebook fan page: https://www.facebook.com/Evony.The.Kings.Return/ NOTICE: Evony: The King’s Return is a completely free-to-play game, however there are some game items that can also be purchased for real money. If you don’t want to use this feature, please disable in-app purchases in your device’s settings. Also under our Terms of Service and Privacy Policy, you must be at least 13 years of age to play or download Evony: The King’s Return. Do you want to be the king of 7 kingdoms? Join now with your friends in the highly addictive RTS/SLG game NOW!
Written user reviews are not shown here. Check current App Store reviews >
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 engaging tutorial and quicker resource generation.
Assumption to check: Game progression can be slow and frustrating.
Validate with people who use this workflow before building.
Hypothesis 2
Provide more free resources and balanced gameplay.
Assumption to check: In-app purchases can be aggressive.
Validate with people who use this workflow before building.
Hypothesis 3
Add more collaborative features, like alliances or guilds.
Assumption to check: Limited social interactions with other players.
Validate with people who use this workflow before building.
Hypothesis 4
Focus on thorough testing and user feedback for improvements.
Assumption to check: Occasional bugs in the UI and gameplay.
Validate with people who use this workflow before building.
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
Supabase
Redux
react-navigation
react-native-reanimated
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.
