Contract Lab
CS2 Trade-Up Assistant
Only for iPhone
Free
iPhone
ContractLab is an analytical calculator for the trade-up contract mechanic inside Counter-Strike 2. It helps players plan material combinations before they execute contracts inside Valve's official game client.
This is a calculator and reference tool. ContractLab does NOT:
• Execute any in-game actions or interact with Valve game servers
• Facilitate buying, selling, or trading of virtual items between users
• Provide financial, investment, or trading advice
• Operate any form of gambling, loot box, or lottery mechanic
— FEATURES —
• Knapsack-based contract solver: compute optimal material combinations under wear-value and quantity constraints
• Wear-value precision calculator down to 7 decimal places
• Multi-platform market price reference (Buff, Steam Market, C5, YouPin, CSFloat, EcoSteam) — data is fetched from each platform's public API on user request, ContractLab does not store or proxy purchase data
• Skin database with collection / rarity / wear-tier metadata
• Local-first compute: contract analysis runs entirely on-device
— DISCLAIMER —
ContractLab is an independent tool developed by fans, not affiliated with, endorsed by, or sponsored by Valve Corporation. Counter-Strike, CS:GO, CS2, and all related marks are trademarks of Valve Corporation. Market price data is informational only and may not reflect real-time prices. Virtual item prices fluctuate; nothing in this app constitutes investment, financial, or trading advice. Use at your own discretion.
— PRIVACY —
ContractLab does not track you across other apps or websites. We do not use the IDFA. Third-party market account credentials are stored only in your device's Keychain and never transmitted to our servers. See the in-app privacy notice for full details.
Questions or feedback: support@cs-contract.com
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
User experience optimization
The developer, 奇 林, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Size
- 44.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later.
- iPhone
- Languages
- English and Simplified Chinese
- Age Rating
4+
- 4+
- Provider
Lin Qi
- Lin Qi has identified itself as a trader for this app and confirmed that this product or service complies with European Union law.
- Address
Czerwonych Dębów 28
05-830 Walendów
Poland - Phone Number
+48 731843153 - Email
wood2black@gmail.com
- Copyright
- © 2026 Lin Qi