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
Idle Heroes - Idle Games
【The unique IDLE RPG on App Store
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
106,599 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.
Build your own version
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 included19 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 Idle Heroes - Idle Games: 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
Introduce varied quests and rewards to keep players engaged.
Assumption to check: Repetitive gameplay can lead to boredom.
Validate with people who use this workflow before building.
Hypothesis 2
Implement more balanced hero progression and scaling.
Assumption to check: Difficulty scaling in later stages can frustrate players.
Validate with people who use this workflow before building.
Hypothesis 3
Offer more free rewards and balance premium content with free alternatives.
Assumption to check: In-app purchases can feel necessary to progress quickly.
Validate with people who use this workflow before building.
Hypothesis 4
Add guilds or cooperative gameplay elements to enhance social interaction.
Assumption to check: Limited social features can reduce player engagement.
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
【The unique IDLE RPG on App Store. Form your heroes and battle for victory!!!!】 Join millions of other players around the world and start your journey from Sara Forest to the High Heaven, leading your band of heroes into ancient ruins to battle the forces of darkness! ------ GAME FEATURES ------ ■ Idle System Set your heroes training while you’re away. When you return to your phone, they will be stronger, gained new abilities, and ready for battle. Grow & Train a powerful squad without all the grinding! ■ Evolving Strategy More than 400 Heroes in different factions with specific skills. Summon your Warriors, TRAIN them to become powerful heroes, or convert them into Spirit material for EVOLVING. Forge magical gears, and outfit your warriors for victory! ■ Tons of Content With battlegrounds galore and dungeons aplenty, heroic quests, mysterious towers, arena, guild, much fun to enjoy! ■ Guild Wars Fight alongside your friends and players everywhere in a war for control of the floating continent. Join multiplayer guild boss-battles and lead your guild to supremacy! ■ Worldwide Arena Put forth your best heroes to do battle in the ARENA. Watch them PK online in a multiplayer contest for glory! Climb the Leader board for the best rewards! ————— Subscription Extra Gold: 1. Gold coin in auto-battle +100% for one week 2. A special gold dragon avatar for one week $0.99 weekly（Price may vary by location） ————— Price may vary by location. Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period,and identify the cost of the renewal. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. Any unused portion of a free trial period,if offered,will be forfeited when the user purchases a subscription to that publication,where applicable. —————— Privacy Policy: http://www.droidhang.com/privacyen.html Terms of Service: http://www.droidhang.com/privacyen.html Contact us: Email: [email protected] Facebook: https://www.facebook.com/IdleHeroes Twitter: https://twitter.com/IdleHeroes
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
Supabase
Zustand
React Navigation
React Native Reanimated
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.
