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
Countless Army Mobile Edition
have you ever dreamed of being the villain in a tower defense?
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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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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 Countless Army Mobile Edition: 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
Offer diverse battle modes and unit types to enhance gameplay.
Assumption to check: Lack of engaging content and variety in battles
Validate with people who use this workflow before building.
Hypothesis 2
Simplify onboarding with guided tutorials and tips.
Assumption to check: High barrier to entry for new players due to complex mechanics
Validate with people who use this workflow before building.
Hypothesis 3
Provide clear explanations of benefits and more diverse items for purchase.
Assumption to check: Limited in-app purchase options and unclear benefits
Validate with people who use this workflow before building.
Hypothesis 4
Implement a daily login reward system to encourage user engagement.
Assumption to check: Poor user retention due to lack of daily rewards
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
have you ever dreamed of being the villain in a tower defense? be the one who sends waves and waves of troops to break through the enemy defenses in this reverse tower defense. summon, conquer and upgrade your troops to dominate the whole world! summon your troops and conquer! choose the troops, the order and the path you’ll send in each wave. think of your strategies to conquer each map. invade countless map! play through the kingdoms, each with their own features. plains, forest, coast, wasteland, snowed mountains and desert, conquer everything on your own time. unlock new troops and ipgrade them! unlock units, choose their profession, upgrade the stats and change their skins. conquer and hold kingdoms! dominate each state of the region, advance without rest with your troops to conquer the whole world. but take care, the states can rebel. characteristics: - 6 kingdoms with 46 maps total. - 16 enemy defenses. - 12 troops to unlock, each with 2 different professions. - many skins to each troop to use at your own liking. - 6 spells to help the units through the waves. - a skilltree with more than 50 unlocks. - changing climate, rain, clouds, storm, mist… you can face many of them in your conquest.
Written user reviews are not shown here. Check current App Store reviews >
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
Redux
Axios
React Navigation
Shadcn/UI
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.
