Can I study 1-on-1 classes with a group subscription?

Yes you can and also the other way round.

When you buy a subscription the number of Flexi Credits needed for it will be added to your account.

If you later decide you rather want to use those credits to study another type of class or another language that is no problem at all.

Flexi Credits work like “money” inside Flexi Classes and anything that is offered with Flexi Classes you can buy with Flexi Credits.