Download s4
Get started with advanced security protection on your platform. One license works across all your devices.
Download for Other Platforms
Quick Start Guide
Download & Install
Download the app for your platform and follow the installation prompts.
Start Free Trial
Your 5-day trial begins automatically when you first launch the app.
Explore Features
Test all features including VPN, firewall, and threat protection.
Purchase License
After your trial, purchase a license to continue using s4 on all devices.
Frequently Asked Questions
How does the trial work?
Your 5-day trial starts automatically when you first launch s4. No credit card or account creation required. Full access to all features during the trial period.
Can I use one license on multiple devices?
Yes! Basic tier supports 1 device, Professional supports 3 devices, and Enterprise supports up to 10 devices. Your license works across all platforms (macOS, iOS, Linux, Android, Windows).
What happens after the trial expires?
After your 5-day trial ends, you'll be prompted to enter a license key. You can purchase a license from our website. Your settings and configuration will be preserved.
Can I use s4 offline?
Yes! s4 works offline with a 7-day grace period. The app validates your license every 24 hours when connected to the internet, but will continue working for up to 7 days offline.
How do I get my license key?
After purchasing, you'll receive your license key via email immediately. You can also access it anytime from your customer portal.