📖 About the Spark System

The Arknights spark system, officially called "Headhunting Data Contract," was introduced to provide a safety net for players pulling on limited banners. This system ensures that you can obtain your desired limited operator even with the worst possible luck.

Every pull on a limited banner grants you one Headhunting Data Contract. These can be exchanged for:

• 6★ Limited Operator: 300 Data Contracts
• 5★ Limited Operator: 75 Data Contracts
• Various materials when the banner ends

🎮 How to Use This Calculator

This calculator helps you plan your resource expenditure for limited banners:

1. Enter your current resources: Input your Orundum, Originite Prime, permits, and existing Data Contracts
2. Set your goal: Choose whether you want the 6★, 5★, or both operators
3. Input pity count: Enter how many pulls you've made since your last 6★
4. Calculate: Get detailed breakdown of what you need

The calculator accounts for pity rates, multiple currency types, and probability calculations.

💡 Pro Tips for Limited Banners

• Save 300 pulls: Always aim to have enough for a guaranteed spark
• Track your pity: Higher pity count means better 6★ rates
• Convert Originite Prime: 1 OP = 180 Orundum (refresh packs give better value)
• Daily income: Complete daily/weekly missions for ~1800 Orundum per week
• Single pulls: Pull one at a time when close to pity for better resource management
• Banner timing: Limited banners typically run for 2 weeks

🔢 Resource Conversion Rates

Understanding the conversion rates helps optimize your spending:

• 1 Pull: 600 Orundum OR 1 Headhunting Permit
• 10 Pulls: 6,000 Orundum OR 1 Ten-Pull Permit
• Originite Prime: 1 OP = 180 Orundum (direct conversion)
• Refresh Packs: Better OP to Orundum ratio (varies by level)
• Monthly Card: 200 Orundum daily for 30 days
• Annihilation: Up to 1,800 Orundum weekly

🎯 Pity System Explained

Arknights uses a sophisticated pity system to ensure fair rates:

• Standard Rate: 2% for 6★ operators
• Pity Activation: After 50 pulls without a 6★
• Rate Increase: +2% per pull after 50th pull
• Maximum Pity: 100% rate at 99th pull (guaranteed)
• Pity Reset: Counter resets when you get any 6★
• Banner Carryover: Pity carries between standard banners but NOT limited banners

⚡ Calculator Features

This advanced calculator includes:

• Multi-currency support: Orundum, OP, permits, contracts
• Pity calculations: Accurate probability based on current pity
• Income projection: Factor in daily/weekly resources
• Responsive design: Works on all devices
• Real-time updates: Instant calculations as you type
• Probability analysis: Chance to get operator before spark