Can my Clients Make Purchases for their friends on the app?

Your clients can 100% make purchases for their friends on the mobile application, if you choose to allow it within your settings. 

In your settings tab under setup in the admin there is an app settings area. Here you can choose to enable purchasing items for others as well as enable purchasing account balances for others. Once you choose to enable this your clients will see a "gift it" button in the mobile application. This button looks like a gift.

This gifting is allowed for classes, events, series, class packs, one on one packs, but is not allowed for memberships. If a client wants to purchase a membership for a friend, the best option is to instruct them to purchase a digital gift card for that friend and create a custom message on the gift card about what the purchase was for.