# 📦 sing-box for iOS - Next-Generation Cross-Platform Proxy Tool

> 🌟 sing-box is an emerging cross-platform proxy software developed in Go, providing modern proxy solutions on iOS platform and representing an excellent example of free and open-source proxy tools.

## ✨ Product Features

### 🎯 Core Advantages

- 🆓 **Open Source & Free**: Completely open source with free iOS version
- 🚀 **High Performance**: Developed in Go language for excellent performance
- 🌍 **Cross-Platform**: Unified configuration format for consistent multi-platform experience
- 🔄 **Continuous Updates**: Active development team with rapid feature iteration
- 🛡️ **Modern**: Adopts latest networking technologies and security standards

### 🔗 Protocol Support

| Protocol Type | Support Status | Feature Description |
|---------------|----------------|---------------------|
| 🔒 Shadowsocks | ✅ | Full version support, performance optimized |
| 🌟 VMess (V2Ray) | ✅ | Complete functionality support |
| ⚡ VLESS | ✅ | Lightweight protocol |
| 🛡️ Trojan | ✅ | TLS camouflaged traffic |
| 🚀 Hysteria | ✅ | QUIC high-speed protocol |
| 🌊 TUIC | ✅ | New QUIC-based protocol |
| 🔐 WireGuard | ✅ | Modern VPN protocol |
| 🧦 SOCKS5 | ✅ | Universal proxy protocol |

### 🛠️ Feature Highlights

| Feature Module | Specific Functions | Advantages |
|----------------|-------------------|------------|
| 🌐 **Network Core** | TUN mode, system proxy | Global traffic takeover |
| 📡 **DNS Service** | Built-in DNS server | Prevent DNS leaks |
| 🎯 **Routing System** | Flexible rule engine | Precise traffic splitting |
| 📊 **Traffic Monitoring** | Real-time statistics and analysis | Detailed usage information |
| 🔧 **Configuration Management** | JSON configuration format | Standardized configuration |
| 🔄 **Hot Reload** | Dynamic configuration updates | No service restart needed |

### 📱 System Requirements

- **Minimum Version**: iOS 15.0 or higher
- **Recommended Version**: iOS 16.0 and above
- **Compatible Devices**: iPhone / iPad
- **Storage Requirement**: About 100MB available space
- **Memory Requirement**: 3GB RAM or above recommended

---

## 📥 Download & Installation

### 🏪 App Store Information

> 🎉 **Great News**
>
> - sing-box iOS version is **completely free**
> - **Not available** in China mainland App Store
> - Requires **non-China mainland Apple ID**
> - Excellent value compared to other paid apps

#### 💰 Price Comparison

| App | Price | Open Source | Feature Completeness |
|-----|-------|-------------|---------------------|
| **sing-box** | **Free** | ✅ Open Source | ⭐⭐⭐⭐ |
| Shadowrocket | $2.99 | ❌ Closed Source | ⭐⭐⭐⭐ |
| Quantumult X | $7.99 | ❌ Closed Source | ⭐⭐⭐⭐⭐ |
| Surge | $49.99 | ❌ Closed Source | ⭐⭐⭐⭐⭐ |

### 🆚 Advantage Comparison

Comparison with other clients:

| Feature Comparison | sing-box | Shadowrocket | Quantumult X |
|-------------------|----------|--------------|--------------|
| 🏷️ **Price** | Free | $2.99 | $7.99 |
| 🔓 **Open Source** | ✅ | ❌ | ❌ |
| 🚀 **Performance** | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
| 📚 **Ease of Use** | ⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ |
| 🔧 **Functionality** | ⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐⭐ |
| 🔄 **Update Frequency** | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ |

---

## ⚠️ Usage Notes

### 🆓 Free Software Advantages

> 🎉 **Important Notice**
>
> - sing-box iOS version is **completely free**
> - Based on open source project with transparent and auditable code
> - No need to worry about payment and subscription issues
> - Continuous feature updates with community-driven development

### 🎯 Target Users

> 📋 **Recommended Users**
>
> - ✅ **Budget-Conscious**: Want free but powerful tools
> - ✅ **Tech Enthusiasts**: Love open source software and follow technology development
> - ✅ **Privacy-Focused**: Prefer transparent and auditable code
> - ✅ **Performance Seekers**: Need high-performance proxy solutions

### 📚 Technical Support Scope

> 📋 **Service Description**
>
> - ✅ **Basic Configuration**: Configuration import and connection tutorials provided
> - ✅ **Common Issues**: Basic usage questions answered
> - ❌ **Advanced Configuration**: Complex routing and rule configuration not provided
> - ❌ **JSON Editing**: Manual configuration file editing guidance not provided
> - 💡 **Learning Resources**: Recommend official documentation and community support

---

## 🚀 Usage Tutorial

### 📋 Prerequisites

Before starting, please ensure:

- ✅ sing-box downloaded and installed from App Store
- ✅ Valid proxy service configuration available
- ✅ Basic understanding of JSON configuration format
- ✅ Device network connection is normal

### 🛠️ Basic Configuration

#### 🔗 Configuration Import Process

##### Step 1: Launch Application

Open sing-box and enter the main interface:

![Application Main Interface](Singbox-01.png)

> 💡 First launch will require permission setup, please follow the prompts

##### Step 2: Add Configuration

Click the "+" button to add new configuration:

![Add Configuration](Singbox-02.png)

##### Step 3: Import Method

Choose configuration import method (URL, file, or manual):

![Import Method](Singbox-03.png)

##### Step 4: Configuration Details

Enter configuration information and save:

![Configuration Details](Singbox-04.png)

##### Step 5: Enable Connection

Select configuration and start proxy service:

![Enable Connection](Singbox-05.png)

---

## 🎛️ Advanced Features

### 🌐 TUN Mode

- **Global Proxy**: System-level traffic interception
- **DNS Hijacking**: Built-in DNS server prevents leaks
- **Route Table**: Custom routing rules for precise control

### 📊 Traffic Monitoring

- **Real-time Statistics**: Live traffic speed and usage monitoring
- **Connection Details**: View active connections and protocols
- **Historical Data**: Traffic usage history and analytics

### 🔧 Configuration Management

- **JSON Format**: Standard configuration file format
- **Hot Reload**: Dynamic configuration updates without restart
- **Profile Switching**: Quick switching between multiple configurations

---

## ❓ Frequently Asked Questions

### 🔧 Configuration Issues

**Q: Configuration import failed?**

A: Troubleshooting steps:

- Verify configuration file format is correct JSON
- Check network connectivity for URL imports
- Ensure proxy server information is accurate
- Try manual configuration entry

**Q: Connection established but no internet access?**

A: Common solutions:

- Check TUN permission is granted
- Verify DNS settings are correct
- Test with different proxy nodes
- Review routing rules configuration

### 📱 Performance Issues

**Q: High battery consumption?**

A: Optimization tips:

- Disable unnecessary routing rules
- Use direct connection for local traffic
- Reduce logging verbosity
- Close unused features

**Q: Slow connection speeds?**

A: Performance optimization:

- Select geographically closer servers
- Use appropriate encryption methods
- Check local network quality
- Optimize routing configuration

---

## 🔗 Related Resources

### 📚 Official Resources

- 🏠 [sing-box Official GitHub](https://github.com/SagerNet/sing-box)
- 📖 [Configuration Documentation](https://sing-box.sagernet.org/)
- 💬 [Community Discussions](https://github.com/SagerNet/sing-box/discussions)

### 🌟 Community Resources

- 🔧 [Configuration Examples](https://github.com/chika0801/sing-box-examples)
- 📜 [Rule Sets](https://github.com/Loyalsoldier/geoip)
- 🎯 [Tutorial Collection](https://github.com/chengxiaoxiao/sing-box)

### 🛠️ Tools & Utilities

- 🔧 [Configuration Converter](https://github.com/Toperlock/sing-box-subscribe)
- 📊 [Speed Testing](https://fast.com/)
- 🎯 [Rule Generator](https://github.com/MetaCubeX/meta-rules-dat)

---

## 💡 Usage Tips

### ⚡ Performance Optimization

1. **Efficient Routing**: Use precise rules to minimize unnecessary processing
2. **DNS Configuration**: Use reliable DNS servers for better resolution
3. **Regular Updates**: Keep both app and configurations up to date

### 🛡️ Security Best Practices

1. **Configuration Security**: Only use trusted configuration sources
2. **Privacy Protection**: Review and understand what data is processed
3. **Update Vigilance**: Keep software updated for latest security patches

---

## 🎯 Summary & Evaluation

### ✅ Advantages

- 🆓 **Completely Free**: No cost barrier for high-quality proxy tool
- 🔓 **Open Source**: Transparent code for security and trust
- 🚀 **High Performance**: Go language provides excellent speed and efficiency
- 🔄 **Active Development**: Regular updates and feature improvements

### ❌ Considerations

- 📚 **Learning Curve**: JSON configuration may be challenging for beginners
- 🎨 **Interface Simplicity**: Less polished UI compared to paid alternatives
- 📖 **Documentation**: Community-driven support may vary in quality
- 🔧 **Advanced Features**: Some enterprise features may be limited

### 🎯 Recommended For

- 🆓 **Budget Users**: Those seeking free but powerful proxy solutions
- 🔓 **Open Source Advocates**: Users who prefer transparent and auditable software
- 🚀 **Performance Enthusiasts**: Those who prioritize speed and efficiency
- 🌍 **Cross-Platform Users**: Those using multiple operating systems

---

> 📅 Last Updated: July 10, 2025 | 📦 Applicable Version: sing-box for iOS 1.8.0
