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
Stranger Heroes
Where modern, cyberpunk, anime, and beautiful girl characters gather across time and space—the most wildly mixed tower defense army in history has arrived! Prepare for the most hilariously chaotic tower defense advent...
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.2
5 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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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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 Stranger Heroes: 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 more customization features for heroes.
Assumption to check: Limited character customization options.
Validate with people who use this workflow before building.
Hypothesis 2
Add variety in battle modes or environments.
Assumption to check: Repetitive battle mechanics.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the purchase process and provide clear value.
Assumption to check: In-app purchases can be confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Optimize loading times and update frequency.
Assumption to check: Slow loading times for updates.
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
Where modern, cyberpunk, anime, and beautiful girl characters gather across time and space—the most wildly mixed tower defense army in history has arrived! Prepare for the most hilariously chaotic tower defense adventure ever! Evil souls roam the skies, and YOU, the fearless leader of the Chaos Squad, must lead this ragtag crew to fend off hordes of invading monsters! Easy gameplay, explosive skills, and absurd cross-era comedy collide—this is pure, unhinged fun! =========== Rewards Galore =========== Log in to claim 1000 free gacha pulls, exclusive skins and decorations including titles, avatar frames, chat frames, and more awesome rewards! Stack all your starting buffs high! Visit our Facebook fan page【Stranger Heroes】to claim them for free! 【Hero Squad Assembled Across Time】 Luna Lucia: A moon princess with full-on chuunibyou energy, complete with “moonlight effects” — even sneezing makes stars fall… though it’s really just dark circles from staying up late binging anime. Scarlet Silas: A vampire with glowing red eyes; stare into her gaze, and enemies will be mentally paralyzed, unable to move an inch. Tsundere Lemon Girl: Self-proclaimed “esper with sky-high acidity” who hurls ultra-sour lemon bombs, twisting enemies’ faces in agony while accidentally whitening their skin. And many more ridiculous characters waiting to be unlocked! 【Explosive Skill Spectacle】 Full-screen effects: Fire dragons, snowman blasts, black hole devour, and chaos lemon bomb attacks! Combo skills: 10,000V Blue Spark (leaky version) + Sun Goddess (battery-saver mode) — Enemies: “This voltage is unstable… I… I… (twitch) STAND AT ATTENTION!” Live2D animations: Every character features over-the-top skill effects and battle animations! 【Easy & Casual Gameplay】 One-handed controls: Swipe to deploy and unleash chaotic skills with ease! Auto-battle: AFK victory guaranteed, perfect for casual players! Chibi-style maps: A baseball stadium turned battlefield, a fridge as a resource node, and a dining table as your core base! 【Contact Us】 Facebook Fanpage & Support: https://gl.gamehaza.com/fPAIQwp
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
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Axios
Lottie for animations
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.
