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
Arknights
Take on the role of a key member of Rhodes Island, a pharmaceutical company that fights both a deadly infection and the unrest it leaves in its wake
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
10,112 ratings · Top 15%
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 included17 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 Arknights: 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
Include a tutorial mode or tooltips to guide users.
Assumption to check: Complexity of game mechanics can overwhelm new players.
Validate with people who use this workflow before building.
Hypothesis 2
Offer more free rewards or balanced gameplay.
Assumption to check: In-game purchases can lead to pay-to-win perceptions.
Validate with people who use this workflow before building.
Hypothesis 3
Implement a chat feature for better interaction.
Assumption to check: Limited communication options between players.
Validate with people who use this workflow before building.
Hypothesis 4
Prioritize thorough testing and updates for stability.
Assumption to check: Occasional bugs during gameplay can frustrate users.
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
Take on the role of a key member of Rhodes Island, a pharmaceutical company that fights both a deadly infection and the unrest it leaves in its wake. Together with your leader Amiya, you’ll recruit Operators, train them, then assign them to various operations to protect the innocent and resist those who would thrust the world into turmoil. ・Gorgeous anime-style game with a perfect combination of RPG and strategy elements ・Hundreds of unique Operators across a variety of classes open up countless gameplay options ・Auto Deploy system conveniently allows you to free up your hands ・Carve out a home, just the way you want it, with the Base construction system ・A robust soundtrack and some of the most famous Japanese voice actors and actresses will give you a sublime auditory experience. Arknights Official Homepage: https://www.arknights.global/ Official Discord Server: https://discord.gg/arknights Official X Account: https://x.com/ArknightsEN Official Facebook Page: https://www.facebook.com/ArknightsGlobal/ Official Instagram: https://www.instagram.com/arknights_messenger_official/
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
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axios
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.
