You'll need to be connected to:

• Unlock full access after purchase
• Download the full Essentials after purchase
• Download Lesson Packs
• Get the latest Remakes

If you don't need to download lessons and have already authorized, you can use Syntorial offline for up to 30 days. To renew your 30 day offline access you just need to open Syntorial with an active internet connection to restart the 30 day offline access.