What is the difference between Chess Mentor offered on Chess.com and Chess Mentor offered for sale on the 'Shop Online' section under 'Resources'?

the period of using, and the tactics.

The biggest difference is the updates. With the online version, you get the updated and newest lessons the minute they are posted. With the offline version, you have to pay for additional lessons.

I am very pleased with the online version here on Chess.com. I was wondering if I was missing anything. Seems like I made the right decision